231231951 has 12 divisors (see below), whose sum is σ = 340304328. Its totient is φ = 151245744.

The previous prime is 231231947. The next prime is 231231971. The reversal of 231231951 is 159132132.

It is not a de Polignac number, because 231231951 - 2² = 231231947 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231231901) 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, 241905 + ... + 242858.

It is an arithmetic number, because the mean of its divisors is an integer number (28358694).

Almost surely, 2^231231951 is an apocalyptic number.

231231951 is a deficient number, since it is larger than the sum of its proper divisors (109072377).

231231951 is a wasteful number, since it uses less digits than its factorization.

231231951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484822 (or 484819 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 231231951 is about 15206.3128667011. The cubic root of 231231951 is about 613.7845436925.

The spelling of 231231951 in words is "two hundred thirty-one million, two hundred thirty-one thousand, nine hundred fifty-one".