251655556147 has 2 divisors, whose sum is σ = 251655556148. Its totient is φ = 251655556146.

The previous prime is 251655556123. The next prime is 251655556193. The reversal of 251655556147 is 741655556152.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251655556147 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 251655556094 and 251655556103.

It is not a weakly prime, because it can be changed into another prime (251655556847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125827778073 + 125827778074.

It is an arithmetic number, because the mean of its divisors is an integer number (125827778074).

Almost surely, 2^251655556147 is an apocalyptic number.

251655556147 is a deficient number, since it is larger than the sum of its proper divisors (1).

251655556147 is an equidigital number, since it uses as much as digits as its factorization.

251655556147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300000, while the sum is 52.

The spelling of 251655556147 in words is "two hundred fifty-one billion, six hundred fifty-five million, five hundred fifty-six thousand, one hundred forty-seven".