31405213744828 has 48 divisors (see below), whose sum is σ = 69978348647424. Its totient is φ = 11975461439040.

The previous prime is 31405213744823. The next prime is 31405213744843. The reversal of 31405213744828 is 82844731250413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31405213744823) 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, 1084719351 + ... + 1084748302.

It is an arithmetic number, because the mean of its divisors is an integer number (1457882263488).

Almost surely, 2^{31405213744828} is an apocalyptic number.

It is an amenable number.

31405213744828 is an abundant number, since it is smaller than the sum of its proper divisors (38573134902596).

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

31405213744828 is a wasteful number, since it uses less digits than its factorization.

31405213744828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169467722 (or 2169467720 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 31405213744828 in words is "thirty-one trillion, four hundred five billion, two hundred thirteen million, seven hundred forty-four thousand, eight hundred twenty-eight".