231455220025 has 12 divisors (see below), whose sum is σ = 288765241552. Its totient is φ = 184028196240.

The previous prime is 231455220023. The next prime is 231455220089. The reversal of 231455220025 is 520022554132.

It is not a de Polignac number, because 231455220025 - 2¹ = 231455220023 is a prime.

It is a super-2 number, since 2×231455220025² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231455220023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28395339 + ... + 28403488.

Almost surely, 2^231455220025 is an apocalyptic number.

231455220025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231455220025 is a deficient number, since it is larger than the sum of its proper divisors (57310021527).

231455220025 is a wasteful number, since it uses less digits than its factorization.

231455220025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56799000 (or 56798995 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 231455220025 its reverse (520022554132), we get a palindrome (751477774157).

The spelling of 231455220025 in words is "two hundred thirty-one billion, four hundred fifty-five million, two hundred twenty thousand, twenty-five".