53981651 has 2 divisors, whose sum is σ = 53981652. Its totient is φ = 53981650.

The previous prime is 53981617. The next prime is 53981687. The reversal of 53981651 is 15618935.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53981651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53981251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26990825 + 26990826.

It is an arithmetic number, because the mean of its divisors is an integer number (26990826).

Almost surely, 2^53981651 is an apocalyptic number.

53981651 is a deficient number, since it is larger than the sum of its proper divisors (1).

53981651 is an equidigital number, since it uses as much as digits as its factorization.

53981651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 53981651 is about 7347.2206309597. The cubic root of 53981651 is about 377.9334984678.

The spelling of 53981651 in words is "fifty-three million, nine hundred eighty-one thousand, six hundred fifty-one".