31428872888855 has 32 divisors (see below), whose sum is σ = 40666910566464. Its totient is φ = 23179797835776.

The previous prime is 31428872888807. The next prime is 31428872888867. The reversal of 31428872888855 is 55888827882413.

It is a cyclic number.

It is not a de Polignac number, because 31428872888855 - 2⁴⁰ = 30329361261079 is a prime.

It is a super-2 number, since 2×31428872888855² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (77) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1030540967 + ... + 1030571463.

It is an arithmetic number, because the mean of its divisors is an integer number (1270840955202).

Almost surely, 2^{31428872888855} is an apocalyptic number.

31428872888855 is a deficient number, since it is larger than the sum of its proper divisors (9238037677609).

31428872888855 is a wasteful number, since it uses less digits than its factorization.

31428872888855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49955.

The product of its digits is 2202009600, while the sum is 77.

The spelling of 31428872888855 in words is "thirty-one trillion, four hundred twenty-eight billion, eight hundred seventy-two million, eight hundred eighty-eight thousand, eight hundred fifty-five".