31455513540 has 96 divisors (see below), whose sum is σ = 106758126720. Its totient is φ = 7625577600.

The previous prime is 31455513533. The next prime is 31455513541. The reversal of 31455513540 is 4531555413.

31455513540 is a `hidden beast` number, since 3 + 14 + 55 + 51 + 3 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 31455513495 and 31455513504.

It is not an unprimeable number, because it can be changed into a prime (31455513541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2641831 + ... + 2653710.

It is an arithmetic number, because the mean of its divisors is an integer number (1112063820).

Almost surely, 2^31455513540 is an apocalyptic number.

31455513540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31455513540 is an abundant number, since it is smaller than the sum of its proper divisors (75302613180).

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

31455513540 is a wasteful number, since it uses less digits than its factorization.

31455513540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5295570 (or 5295562 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 31455513540 in words is "thirty-one billion, four hundred fifty-five million, five hundred thirteen thousand, five hundred forty".