251032656101 has 2 divisors, whose sum is σ = 251032656102. Its totient is φ = 251032656100.

The previous prime is 251032656073. The next prime is 251032656103. The reversal of 251032656101 is 101656230152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 241763973025 + 9268683076 = 491695^2 + 96274^2 .

It is a cyclic number.

It is not a de Polignac number, because 251032656101 - 2⁶ = 251032656037 is a prime.

Together with 251032656103, 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 (251032656103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125516328050 + 125516328051.

It is an arithmetic number, because the mean of its divisors is an integer number (125516328051).

Almost surely, 2^251032656101 is an apocalyptic number.

It is an amenable number.

251032656101 is a deficient number, since it is larger than the sum of its proper divisors (1).

251032656101 is an equidigital number, since it uses as much as digits as its factorization.

251032656101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 251032656101 its reverse (101656230152), we get a palindrome (352688886253).

The spelling of 251032656101 in words is "two hundred fifty-one billion, thirty-two million, six hundred fifty-six thousand, one hundred one".