31251000234 has 32 divisors (see below), whose sum is σ = 65831400000. Its totient is φ = 9862763904.

The previous prime is 31251000203. The next prime is 31251000251. The reversal of 31251000234 is 43200015213.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31251000234.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108142 + ... + 272390.

It is an arithmetic number, because the mean of its divisors is an integer number (2057231250).

Almost surely, 2^31251000234 is an apocalyptic number.

31251000234 is an abundant number, since it is smaller than the sum of its proper divisors (34580399766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31251000234 is a wasteful number, since it uses less digits than its factorization.

31251000234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165942.

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 31251000234 its reverse (43200015213), we get a palindrome (74451015447).

The spelling of 31251000234 in words is "thirty-one billion, two hundred fifty-one million, two hundred thirty-four", and thus it is an aban number.