31980502 has 16 divisors (see below), whose sum is σ = 50905152. Its totient is φ = 15016320.

The previous prime is 31980493. The next prime is 31980503. The reversal of 31980502 is 20508913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31980503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21763 + ... + 23185.

It is an arithmetic number, because the mean of its divisors is an integer number (3181572).

Almost surely, 2^31980502 is an apocalyptic number.

31980502 is a deficient number, since it is larger than the sum of its proper divisors (18924650).

31980502 is a wasteful number, since it uses less digits than its factorization.

31980502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 31980502 is about 5655.1305908882. The cubic root of 31980502 is about 317.4157157392.

The spelling of 31980502 in words is "thirty-one million, nine hundred eighty thousand, five hundred two".