231150220551 has 24 divisors (see below), whose sum is σ = 335381904000. Its totient is φ = 153409448976.

The previous prime is 231150220541. The next prime is 231150220603. The reversal of 231150220551 is 155022051132.

It is not a de Polignac number, because 231150220551 - 2⁶ = 231150220487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231150220541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3515560 + ... + 3580706.

It is an arithmetic number, because the mean of its divisors is an integer number (13974246000).

Almost surely, 2^231150220551 is an apocalyptic number.

231150220551 is a deficient number, since it is larger than the sum of its proper divisors (104231683449).

231150220551 is a wasteful number, since it uses less digits than its factorization.

231150220551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66915 (or 66912 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 231150220551 its reverse (155022051132), we get a palindrome (386172271683).

The spelling of 231150220551 in words is "two hundred thirty-one billion, one hundred fifty million, two hundred twenty thousand, five hundred fifty-one".