231120501216 has 96 divisors (see below), whose sum is σ = 669819362688. Its totient is φ = 69192675840.

The previous prime is 231120501179. The next prime is 231120501289. The reversal of 231120501216 is 612105021132.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230811 + ... + 1406106.

It is an arithmetic number, because the mean of its divisors is an integer number (6977285028).

Almost surely, 2^231120501216 is an apocalyptic number.

It is an amenable number.

231120501216 is an abundant number, since it is smaller than the sum of its proper divisors (438698861472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231120501216 is a wasteful number, since it uses less digits than its factorization.

231120501216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637024 (or 2637016 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 231120501216 its reverse (612105021132), we get a palindrome (843225522348).

The spelling of 231120501216 in words is "two hundred thirty-one billion, one hundred twenty million, five hundred one thousand, two hundred sixteen".