251527061 has 2 divisors, whose sum is σ = 251527062. Its totient is φ = 251527060.

The previous prime is 251527007. The next prime is 251527069. The reversal of 251527061 is 160725152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161163025 + 90364036 = 12695^2 + 9506^2 .

It is a cyclic number.

It is not a de Polignac number, because 251527061 - 2²⁶ = 184418197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251527069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125763530 + 125763531.

It is an arithmetic number, because the mean of its divisors is an integer number (125763531).

Almost surely, 2^251527061 is an apocalyptic number.

It is an amenable number.

251527061 is a deficient number, since it is larger than the sum of its proper divisors (1).

251527061 is an equidigital number, since it uses as much as digits as its factorization.

251527061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 251527061 is about 15859.6046924253. The cubic root of 251527061 is about 631.2405730579.

The spelling of 251527061 in words is "two hundred fifty-one million, five hundred twenty-seven thousand, sixty-one".