251415220151 has 2 divisors, whose sum is σ = 251415220152. Its totient is φ = 251415220150.

The previous prime is 251415220129. The next prime is 251415220193. The reversal of 251415220151 is 151022514152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 251415220151 - 2¹⁰ = 251415219127 is a prime.

It is a super-2 number, since 2×251415220151² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251415220051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125707610075 + 125707610076.

It is an arithmetic number, because the mean of its divisors is an integer number (125707610076).

Almost surely, 2^251415220151 is an apocalyptic number.

251415220151 is a deficient number, since it is larger than the sum of its proper divisors (1).

251415220151 is an equidigital number, since it uses as much as digits as its factorization.

251415220151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4000, while the sum is 29.

The spelling of 251415220151 in words is "two hundred fifty-one billion, four hundred fifteen million, two hundred twenty thousand, one hundred fifty-one".