551501651 has 2 divisors, whose sum is σ = 551501652. Its totient is φ = 551501650.

The previous prime is 551501609. The next prime is 551501663. The reversal of 551501651 is 156105155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551501651 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551503651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275750825 + 275750826.

It is an arithmetic number, because the mean of its divisors is an integer number (275750826).

Almost surely, 2^551501651 is an apocalyptic number.

551501651 is a deficient number, since it is larger than the sum of its proper divisors (1).

551501651 is an equidigital number, since it uses as much as digits as its factorization.

551501651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 551501651 is about 23484.0722831454. The cubic root of 551501651 is about 820.0662503483.

The spelling of 551501651 in words is "five hundred fifty-one million, five hundred one thousand, six hundred fifty-one".