231435232155 has 16 divisors (see below), whose sum is σ = 411440412960. Its totient is φ = 123432123744.

The previous prime is 231435232151. The next prime is 231435232169. The reversal of 231435232155 is 551232534132.

231435232155 is a `hidden beast` number, since 2 + 3 + 1 + 435 + 2 + 3 + 215 + 5 = 666.

It is not a de Polignac number, because 231435232155 - 2² = 231435232151 is a prime.

It is a super-3 number, since 3×231435232155³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (231435232151) 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, 857167392 + ... + 857167661.

It is an arithmetic number, because the mean of its divisors is an integer number (25715025810).

Almost surely, 2^231435232155 is an apocalyptic number.

231435232155 is a deficient number, since it is larger than the sum of its proper divisors (180005180805).

231435232155 is a wasteful number, since it uses less digits than its factorization.

231435232155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1714335067 (or 1714335061 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 231435232155 its reverse (551232534132), we get a palindrome (782667766287).

The spelling of 231435232155 in words is "two hundred thirty-one billion, four hundred thirty-five million, two hundred thirty-two thousand, one hundred fifty-five".