31400016 has 20 divisors (see below), whose sum is σ = 81116832. Its totient is φ = 10466656.

The previous prime is 31399999. The next prime is 31400021. The reversal of 31400016 is 61000413.

It is a super-2 number, since 2×31400016² = 1971922009600512, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31399968 and 31400004.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327036 + ... + 327131.

Almost surely, 2^31400016 is an apocalyptic number.

It is an amenable number.

31400016 is an abundant number, since it is smaller than the sum of its proper divisors (49716816).

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

31400016 is a wasteful number, since it uses less digits than its factorization.

31400016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654178 (or 654172 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31400016 is about 5603.5717181098. The cubic root of 31400016 is about 315.4834802729.

Adding to 31400016 its reverse (61000413), we get a palindrome (92400429).

The spelling of 31400016 in words is "thirty-one million, four hundred thousand, sixteen".