231513069 has 8 divisors (see below), whose sum is σ = 308930560. Its totient is φ = 154218816.

The previous prime is 231513067. The next prime is 231513077. The reversal of 231513069 is 960315132.

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

It is not a de Polignac number, because 231513069 - 2¹ = 231513067 is a prime.

It is a super-2 number, since 2×231513069² = 107196602235597522, 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 (231513067) 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, 26332 + ... + 34005.

It is an arithmetic number, because the mean of its divisors is an integer number (38616320).

Almost surely, 2^231513069 is an apocalyptic number.

It is an amenable number.

231513069 is a deficient number, since it is larger than the sum of its proper divisors (77417491).

231513069 is a wasteful number, since it uses less digits than its factorization.

231513069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61619.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 231513069 is about 15215.5535226294. The cubic root of 231513069 is about 614.0331771623.

The spelling of 231513069 in words is "two hundred thirty-one million, five hundred thirteen thousand, sixty-nine".