213745137 has 8 divisors (see below), whose sum is σ = 286700736. Its totient is φ = 141643152.

The previous prime is 213745127. The next prime is 213745139. The reversal of 213745137 is 731547312.

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

It is not a de Polignac number, because 213745137 - 2⁴ = 213745121 is a prime.

It is a super-2 number, since 2×213745137² = 91373967182297538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213745098 and 213745107.

It is not an unprimeable number, because it can be changed into a prime (213745139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212818 + ... + 213819.

It is an arithmetic number, because the mean of its divisors is an integer number (35837592).

Almost surely, 2^213745137 is an apocalyptic number.

It is an amenable number.

213745137 is a deficient number, since it is larger than the sum of its proper divisors (72955599).

213745137 is a wasteful number, since it uses less digits than its factorization.

213745137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426807.

The product of its digits is 17640, while the sum is 33.

The square root of 213745137 is about 14620.0252051766. The cubic root of 213745137 is about 597.9048563597.

It can be divided in two parts, 2137 and 45137, that added together give a palindrome (47274).

The spelling of 213745137 in words is "two hundred thirteen million, seven hundred forty-five thousand, one hundred thirty-seven".