15271961 has 2 divisors, whose sum is σ = 15271962. Its totient is φ = 15271960.

The previous prime is 15271909. The next prime is 15271987. The reversal of 15271961 is 16917251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14868736 + 403225 = 3856^2 + 635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15271961 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15271901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7635980 + 7635981.

It is an arithmetic number, because the mean of its divisors is an integer number (7635981).

Almost surely, 2^15271961 is an apocalyptic number.

It is an amenable number.

15271961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15271961 is an equidigital number, since it uses as much as digits as its factorization.

15271961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 32.

The square root of 15271961 is about 3907.9356443012. The cubic root of 15271961 is about 248.1027637335.

The spelling of 15271961 in words is "fifteen million, two hundred seventy-one thousand, nine hundred sixty-one".