251492047 has 2 divisors, whose sum is σ = 251492048. Its totient is φ = 251492046.

The previous prime is 251491969. The next prime is 251492063. The reversal of 251492047 is 740294152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251492047 is a prime.

It is equal to p_13756552 and since 251492047 and 13756552 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251492077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125746023 + 125746024.

It is an arithmetic number, because the mean of its divisors is an integer number (125746024).

Almost surely, 2^251492047 is an apocalyptic number.

251492047 is a deficient number, since it is larger than the sum of its proper divisors (1).

251492047 is an equidigital number, since it uses as much as digits as its factorization.

251492047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 251492047 is about 15858.5007803386. The cubic root of 251492047 is about 631.2112809372.

The spelling of 251492047 in words is "two hundred fifty-one million, four hundred ninety-two thousand, forty-seven".