31154315653819 has 2 divisors, whose sum is σ = 31154315653820. Its totient is φ = 31154315653818.

The previous prime is 31154315653801. The next prime is 31154315653823. The reversal of 31154315653819 is 91835651345113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31154315653819 is a prime.

It is a super-2 number, since 2×31154315653819² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31154315653819.

It is not a weakly prime, because it can be changed into another prime (31154315653859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15577157826909 + 15577157826910.

It is an arithmetic number, because the mean of its divisors is an integer number (15577157826910).

Almost surely, 2^{31154315653819} is an apocalyptic number.

31154315653819 is a deficient number, since it is larger than the sum of its proper divisors (1).

31154315653819 is an equidigital number, since it uses as much as digits as its factorization.

31154315653819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 55.

The spelling of 31154315653819 in words is "thirty-one trillion, one hundred fifty-four billion, three hundred fifteen million, six hundred fifty-three thousand, eight hundred nineteen".