251826461 has 2 divisors, whose sum is σ = 251826462. Its totient is φ = 251826460.

The previous prime is 251826397. The next prime is 251826473. The reversal of 251826461 is 164628152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149695225 + 102131236 = 12235^2 + 10106^2 .

It is a cyclic number.

It is not a de Polignac number, because 251826461 - 2⁶ = 251826397 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 (251826061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125913230 + 125913231.

It is an arithmetic number, because the mean of its divisors is an integer number (125913231).

Almost surely, 2^251826461 is an apocalyptic number.

It is an amenable number.

251826461 is a deficient number, since it is larger than the sum of its proper divisors (1).

251826461 is an equidigital number, since it uses as much as digits as its factorization.

251826461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 35.

The square root of 251826461 is about 15869.0409603101. The cubic root of 251826461 is about 631.4909351041.

The spelling of 251826461 in words is "two hundred fifty-one million, eight hundred twenty-six thousand, four hundred sixty-one".