31503031400051 has 4 divisors (see below), whose sum is σ = 31503042736992. Its totient is φ = 31503020063112.

The previous prime is 31503031400021. The next prime is 31503031400053. The reversal of 31503031400051 is 15000413030513.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31503031400051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31503031400053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1645046 + ... + 8106308.

It is an arithmetic number, because the mean of its divisors is an integer number (7875760684248).

Almost surely, 2^{31503031400051} is an apocalyptic number.

31503031400051 is a deficient number, since it is larger than the sum of its proper divisors (11336941).

31503031400051 is an equidigital number, since it uses as much as digits as its factorization.

31503031400051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11336940.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 31503031400051 its reverse (15000413030513), we get a palindrome (46503444430564).

The spelling of 31503031400051 in words is "thirty-one trillion, five hundred three billion, thirty-one million, four hundred thousand, fifty-one".