31200013005 has 32 divisors (see below), whose sum is σ = 57155856384. Its totient is φ = 14236762176.

The previous prime is 31200013001. The next prime is 31200013027. The reversal of 31200013005 is 50031000213.

It is a happy number.

It is not a de Polignac number, because 31200013005 - 2² = 31200013001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31200013001) 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 31 ways as a sum of consecutive naturals, for example, 214177 + ... + 329046.

It is an arithmetic number, because the mean of its divisors is an integer number (1786120512).

Almost surely, 2^31200013005 is an apocalyptic number.

31200013005 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

31200013005 is a deficient number, since it is larger than the sum of its proper divisors (25955843379).

31200013005 is a wasteful number, since it uses less digits than its factorization.

31200013005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543785.

The product of its (nonzero) digits is 90, while the sum is 15.

Adding to 31200013005 its reverse (50031000213), we get a palindrome (81231013218).

The spelling of 31200013005 in words is "thirty-one billion, two hundred million, thirteen thousand, five".