31102004 has 6 divisors (see below), whose sum is σ = 54428514. Its totient is φ = 15551000.

The previous prime is 31101989. The next prime is 31102013. The reversal of 31102004 is 40020113.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22090000 + 9012004 = 4700^2 + 3002^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3887747 + ... + 3887754.

It is an arithmetic number, because the mean of its divisors is an integer number (9071419).

Almost surely, 2^31102004 is an apocalyptic number.

It is an amenable number.

31102004 is a deficient number, since it is larger than the sum of its proper divisors (23326510).

31102004 is a wasteful number, since it uses less digits than its factorization.

31102004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7775505 (or 7775503 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 31102004 is about 5576.9170694928. The cubic root of 31102004 is about 314.4822400523.

Adding to 31102004 its reverse (40020113), we get a palindrome (71122117).

The spelling of 31102004 in words is "thirty-one million, one hundred two thousand, four".