15700023971 has 2 divisors, whose sum is σ = 15700023972. Its totient is φ = 15700023970.

The previous prime is 15700023947. The next prime is 15700023979. The reversal of 15700023971 is 17932000751.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15700023971 is a prime.

It is not a weakly prime, because it can be changed into another prime (15700023979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7850011985 + 7850011986.

It is an arithmetic number, because the mean of its divisors is an integer number (7850011986).

Almost surely, 2^15700023971 is an apocalyptic number.

15700023971 is a deficient number, since it is larger than the sum of its proper divisors (1).

15700023971 is an equidigital number, since it uses as much as digits as its factorization.

15700023971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 35.

The spelling of 15700023971 in words is "fifteen billion, seven hundred million, twenty-three thousand, nine hundred seventy-one".