251606063 has 2 divisors, whose sum is σ = 251606064. Its totient is φ = 251606062.

The previous prime is 251606027. The next prime is 251606081. The reversal of 251606063 is 360606152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251606063 - 2²⁶ = 184497199 is a prime.

It is a super-2 number, since 2×251606063² = 126611221876719938, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251606023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125803031 + 125803032.

It is an arithmetic number, because the mean of its divisors is an integer number (125803032).

Almost surely, 2^251606063 is an apocalyptic number.

251606063 is a deficient number, since it is larger than the sum of its proper divisors (1).

251606063 is an equidigital number, since it uses as much as digits as its factorization.

251606063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 251606063 is about 15862.0951642587. The cubic root of 251606063 is about 631.3066548112.

The spelling of 251606063 in words is "two hundred fifty-one million, six hundred six thousand, sixty-three".