31003602804 has 18 divisors (see below), whose sum is σ = 78370218290. Its totient is φ = 10334534256.

The previous prime is 31003602793. The next prime is 31003602827. The reversal of 31003602804 is 40820630013.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28713980304 + 2289622500 = 169452^2 + 47850^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×31003602804² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 430605559 + ... + 430605630.

Almost surely, 2^31003602804 is an apocalyptic number.

It is an amenable number.

31003602804 is an abundant number, since it is smaller than the sum of its proper divisors (47366615486).

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

31003602804 is a wasteful number, since it uses less digits than its factorization.

31003602804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861211199 (or 861211194 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 31003602804 in words is "thirty-one billion, three million, six hundred two thousand, eight hundred four".