31400052 has 12 divisors (see below), whose sum is σ = 73266816. Its totient is φ = 10466680.

The previous prime is 31400029. The next prime is 31400053. The reversal of 31400052 is 25000413.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1308324 + ... + 1308347.

It is an arithmetic number, because the mean of its divisors is an integer number (6105568).

Almost surely, 2^31400052 is an apocalyptic number.

It is an amenable number.

31400052 is an abundant number, since it is smaller than the sum of its proper divisors (41866764).

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

31400052 is a wasteful number, since it uses less digits than its factorization.

31400052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616678 (or 2616676 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 31400052 is about 5603.5749303458. The cubic root of 31400052 is about 315.4836008397.

Adding to 31400052 its reverse (25000413), we get a palindrome (56400465).

The spelling of 31400052 in words is "thirty-one million, four hundred thousand, fifty-two".