425166251 has 2 divisors, whose sum is σ = 425166252. Its totient is φ = 425166250.

The previous prime is 425166239. The next prime is 425166253. The reversal of 425166251 is 152661524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425166251 - 2¹⁰ = 425165227 is a prime.

Together with 425166253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425166253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212583125 + 212583126.

It is an arithmetic number, because the mean of its divisors is an integer number (212583126).

Almost surely, 2^425166251 is an apocalyptic number.

425166251 is a deficient number, since it is larger than the sum of its proper divisors (1).

425166251 is an equidigital number, since it uses as much as digits as its factorization.

425166251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 425166251 is about 20619.5599128594. The cubic root of 425166251 is about 751.9453209026.

The spelling of 425166251 in words is "four hundred twenty-five million, one hundred sixty-six thousand, two hundred fifty-one".