213957337 has 4 divisors (see below), whose sum is σ = 233408016. Its totient is φ = 194506660.

The previous prime is 213957313. The next prime is 213957349. The reversal of 213957337 is 733759312.

It is a happy number.

213957337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213957337 is a prime.

It is a super-2 number, since 2×213957337² = 91555484112263138, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213957337.

It is not an unprimeable number, because it can be changed into a prime (213957377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9725323 + ... + 9725344.

It is an arithmetic number, because the mean of its divisors is an integer number (58352004).

Almost surely, 2^213957337 is an apocalyptic number.

It is an amenable number.

213957337 is a deficient number, since it is larger than the sum of its proper divisors (19450679).

213957337 is a wasteful number, since it uses less digits than its factorization.

213957337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19450678.

The product of its digits is 119070, while the sum is 40.

The square root of 213957337 is about 14627.2805743241. The cubic root of 213957337 is about 598.1026518112.

The spelling of 213957337 in words is "two hundred thirteen million, nine hundred fifty-seven thousand, three hundred thirty-seven".