213400231 has 8 divisors (see below), whose sum is σ = 233040528. Its totient is φ = 193800000.

The previous prime is 213400223. The next prime is 213400247. The reversal of 213400231 is 132004312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213400231 - 2³ = 213400223 is a prime.

It is a super-2 number, since 2×213400231² = 91079317181706722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213400211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731 + ... + 20731.

It is an arithmetic number, because the mean of its divisors is an integer number (29130066).

Almost surely, 2^213400231 is an apocalyptic number.

213400231 is a deficient number, since it is larger than the sum of its proper divisors (19640297).

213400231 is a wasteful number, since it uses less digits than its factorization.

213400231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20033.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 213400231 is about 14608.2247723671. The cubic root of 213400231 is about 597.5830837471.

Adding to 213400231 its reverse (132004312), we get a palindrome (345404543).

The spelling of 213400231 in words is "two hundred thirteen million, four hundred thousand, two hundred thirty-one".