31390050 has 24 divisors (see below), whose sum is σ = 77847696. Its totient is φ = 8370640.

The previous prime is 31390027. The next prime is 31390067. The reversal of 31390050 is 5009313.

It is a junction number, because it is equal to n+sod(n) for n = 31389999 and 31390026.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104484 + ... + 104783.

It is an arithmetic number, because the mean of its divisors is an integer number (3243654).

Almost surely, 2^31390050 is an apocalyptic number.

31390050 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31390050 is an abundant number, since it is smaller than the sum of its proper divisors (46457646).

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

31390050 is a wasteful number, since it uses less digits than its factorization.

31390050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209282 (or 209277 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 31390050 is about 5602.6823932827. The cubic root of 31390050 is about 315.4500998116.

Adding to 31390050 its reverse (5009313), we get a palindrome (36399363).

The spelling of 31390050 in words is "thirty-one million, three hundred ninety thousand, fifty".