231215154051 has 16 divisors (see below), whose sum is σ = 355816251648. Its totient is φ = 130814796000.

The previous prime is 231215154047. The next prime is 231215154073. The reversal of 231215154051 is 150451512132.

It is not a de Polignac number, because 231215154051 - 2² = 231215154047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231215144051) 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, 54504045 + ... + 54508286.

It is an arithmetic number, because the mean of its divisors is an integer number (22238515728).

Almost surely, 2^231215154051 is an apocalyptic number.

231215154051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231215154051 is a deficient number, since it is larger than the sum of its proper divisors (124601097597).

231215154051 is a wasteful number, since it uses less digits than its factorization.

231215154051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109012442.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 231215154051 its reverse (150451512132), we get a palindrome (381666666183).

The spelling of 231215154051 in words is "two hundred thirty-one billion, two hundred fifteen million, one hundred fifty-four thousand, fifty-one".