231865556965 has 16 divisors (see below), whose sum is σ = 325382099328. Its totient is φ = 155295999936.

The previous prime is 231865556963. The next prime is 231865556971. The reversal of 231865556965 is 569655568132.

It is a happy number.

It is not a de Polignac number, because 231865556965 - 2¹ = 231865556963 is a prime.

It is a super-2 number, since 2×231865556965² (a number of 24 digits) 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 (231865556963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77030242 + ... + 77033251.

It is an arithmetic number, because the mean of its divisors is an integer number (20336381208).

Almost surely, 2^231865556965 is an apocalyptic number.

It is an amenable number.

231865556965 is a deficient number, since it is larger than the sum of its proper divisors (93516542363).

231865556965 is a wasteful number, since it uses less digits than its factorization.

231865556965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154063548.

The product of its digits is 58320000, while the sum is 61.

The spelling of 231865556965 in words is "two hundred thirty-one billion, eight hundred sixty-five million, five hundred fifty-six thousand, nine hundred sixty-five".