31403555252 has 24 divisors (see below), whose sum is σ = 59608188360. Its totient is φ = 14417699840.

The previous prime is 31403555237. The next prime is 31403555257. The reversal of 31403555252 is 25255530413.

It can be written as a sum of positive squares in 4 ways, for example, as 1982386576 + 29421168676 = 44524^2 + 171526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403555257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5629127 + ... + 5634702.

It is an arithmetic number, because the mean of its divisors is an integer number (2483674515).

Almost surely, 2^31403555252 is an apocalyptic number.

It is an amenable number.

31403555252 is a deficient number, since it is larger than the sum of its proper divisors (28204633108).

31403555252 is a wasteful number, since it uses less digits than its factorization.

31403555252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11263891 (or 11263889 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The spelling of 31403555252 in words is "thirty-one billion, four hundred three million, five hundred fifty-five thousand, two hundred fifty-two".