15465881 has 2 divisors, whose sum is σ = 15465882. Its totient is φ = 15465880.

The previous prime is 15465871. The next prime is 15465883. The reversal of 15465881 is 18856451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9985600 + 5480281 = 3160^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 15465881 - 2²² = 11271577 is a prime.

It is a super-2 number, since 2×15465881² = 478386950212322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 15465883, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (15465883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7732940 + 7732941.

It is an arithmetic number, because the mean of its divisors is an integer number (7732941).

Almost surely, 2^15465881 is an apocalyptic number.

It is an amenable number.

15465881 is a deficient number, since it is larger than the sum of its proper divisors (1).

15465881 is an equidigital number, since it uses as much as digits as its factorization.

15465881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 38.

The square root of 15465881 is about 3932.6684325023. The cubic root of 15465881 is about 249.1484682008.

The spelling of 15465881 in words is "fifteen million, four hundred sixty-five thousand, eight hundred eighty-one".