231422451 has 16 divisors (see below), whose sum is σ = 349789440. Its totient is φ = 134917920.

The previous prime is 231422447. The next prime is 231422453. The reversal of 231422451 is 154224132.

It is not a de Polignac number, because 231422451 - 2² = 231422447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231422453) 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, 155415 + ... + 156896.

It is an arithmetic number, because the mean of its divisors is an integer number (21861840).

Almost surely, 2^231422451 is an apocalyptic number.

231422451 is a deficient number, since it is larger than the sum of its proper divisors (118366989).

231422451 is a wasteful number, since it uses less digits than its factorization.

231422451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312346.

The product of its digits is 1920, while the sum is 24.

The square root of 231422451 is about 15212.5754229848. The cubic root of 231422451 is about 613.9530524994.

Adding to 231422451 its reverse (154224132), we get a palindrome (385646583).

The spelling of 231422451 in words is "two hundred thirty-one million, four hundred twenty-two thousand, four hundred fifty-one".