63551651 has 2 divisors, whose sum is σ = 63551652. Its totient is φ = 63551650.

The previous prime is 63551633. The next prime is 63551699. The reversal of 63551651 is 15615536.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63551651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63551051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31775825 + 31775826.

It is an arithmetic number, because the mean of its divisors is an integer number (31775826).

Almost surely, 2^63551651 is an apocalyptic number.

63551651 is a deficient number, since it is larger than the sum of its proper divisors (1).

63551651 is an equidigital number, since it uses as much as digits as its factorization.

63551651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 32.

The square root of 63551651 is about 7971.9289384690. The cubic root of 63551651 is about 399.0637498824.

The spelling of 63551651 in words is "sixty-three million, five hundred fifty-one thousand, six hundred fifty-one".