31401887254 has 4 divisors (see below), whose sum is σ = 47102830884. Its totient is φ = 15700943626.

The previous prime is 31401887201. The next prime is 31401887269. The reversal of 31401887254 is 45278810413.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×31401887254² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31401887254.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 7850471812 + ... + 7850471815.

It is an arithmetic number, because the mean of its divisors is an integer number (11775707721).

Almost surely, 2^31401887254 is an apocalyptic number.

31401887254 is a deficient number, since it is larger than the sum of its proper divisors (15700943630).

31401887254 is a wasteful number, since it uses less digits than its factorization.

31401887254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15700943629.

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 31401887254 in words is "thirty-one billion, four hundred one million, eight hundred eighty-seven thousand, two hundred fifty-four".