31457142887 has 16 divisors (see below), whose sum is σ = 32866200000. Its totient is φ = 30078397440.

The previous prime is 31457142877. The next prime is 31457142889. The reversal of 31457142887 is 78824175413.

It is a cyclic number.

It is not a de Polignac number, because 31457142887 - 2¹⁸ = 31456880743 is a prime.

It is a super-2 number, since 2×31457142887² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31457142889) 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, 2813414 + ... + 2824572.

It is an arithmetic number, because the mean of its divisors is an integer number (2054137500).

Almost surely, 2^31457142887 is an apocalyptic number.

31457142887 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

31457142887 is a deficient number, since it is larger than the sum of its proper divisors (1409057113).

31457142887 is a wasteful number, since it uses less digits than its factorization.

31457142887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12506.

The product of its digits is 1505280, while the sum is 50.

The spelling of 31457142887 in words is "thirty-one billion, four hundred fifty-seven million, one hundred forty-two thousand, eight hundred eighty-seven".