251230544130091 has 2 divisors, whose sum is σ = 251230544130092. Its totient is φ = 251230544130090.

The previous prime is 251230544129989. The next prime is 251230544130113. The reversal of 251230544130091 is 190031445032152.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251230544130091 - 2²³ = 251230535741483 is a prime.

It is not a weakly prime, because it can be changed into another prime (251230544137091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125615272065045 + 125615272065046.

It is an arithmetic number, because the mean of its divisors is an integer number (125615272065046).

Almost surely, 2^{251230544130091} is an apocalyptic number.

251230544130091 is a deficient number, since it is larger than the sum of its proper divisors (1).

251230544130091 is an equidigital number, since it uses as much as digits as its factorization.

251230544130091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 251230544130091 in words is "two hundred fifty-one trillion, two hundred thirty billion, five hundred forty-four million, one hundred thirty thousand, ninety-one".