31949231918203 has 2 divisors, whose sum is σ = 31949231918204. Its totient is φ = 31949231918202.

The previous prime is 31949231918141. The next prime is 31949231918341. The reversal of 31949231918203 is 30281913294913.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31949231918203 is a prime.

It is not a weakly prime, because it can be changed into another prime (31949231918503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974615959101 + 15974615959102.

It is an arithmetic number, because the mean of its divisors is an integer number (15974615959102).

Almost surely, 2^{31949231918203} is an apocalyptic number.

31949231918203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31949231918203 is an equidigital number, since it uses as much as digits as its factorization.

31949231918203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 55.

The spelling of 31949231918203 in words is "thirty-one trillion, nine hundred forty-nine billion, two hundred thirty-one million, nine hundred eighteen thousand, two hundred three".