15614981 has 2 divisors, whose sum is σ = 15614982. Its totient is φ = 15614980.

The previous prime is 15614971. The next prime is 15614983. The reversal of 15614981 is 18941651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12496225 + 3118756 = 3535^2 + 1766^2 .

It is a cyclic number.

It is not a de Polignac number, because 15614981 - 2¹⁸ = 15352837 is a prime.

It is a super-2 number, since 2×15614981² = 487655263260722, which contains 22 as substring.

Together with 15614983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15614983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7807490 + 7807491.

It is an arithmetic number, because the mean of its divisors is an integer number (7807491).

Almost surely, 2^15614981 is an apocalyptic number.

It is an amenable number.

15614981 is a deficient number, since it is larger than the sum of its proper divisors (1).

15614981 is an equidigital number, since it uses as much as digits as its factorization.

15614981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 35.

The square root of 15614981 is about 3951.5795575947. The cubic root of 15614981 is about 249.9465539082.

The spelling of 15614981 in words is "fifteen million, six hundred fourteen thousand, nine hundred eighty-one".