31503213052 has 6 divisors (see below), whose sum is σ = 55130622848. Its totient is φ = 15751606524.

The previous prime is 31503213041. The next prime is 31503213151. The reversal of 31503213052 is 25031230513.

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, 3937901628 + ... + 3937901635.

Almost surely, 2^31503213052 is an apocalyptic number.

It is an amenable number.

31503213052 is a deficient number, since it is larger than the sum of its proper divisors (23627409796).

31503213052 is a wasteful number, since it uses less digits than its factorization.

31503213052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7875803267 (or 7875803265 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 31503213052 its reverse (25031230513), we get a palindrome (56534443565).

The spelling of 31503213052 in words is "thirty-one billion, five hundred three million, two hundred thirteen thousand, fifty-two".