251455554223 has 2 divisors, whose sum is σ = 251455554224. Its totient is φ = 251455554222.

The previous prime is 251455554121. The next prime is 251455554269. The reversal of 251455554223 is 322455554152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 251455554223 - 2²⁵ = 251421999791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 251455554223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251455554293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125727777111 + 125727777112.

It is an arithmetic number, because the mean of its divisors is an integer number (125727777112).

Almost surely, 2^251455554223 is an apocalyptic number.

251455554223 is a deficient number, since it is larger than the sum of its proper divisors (1).

251455554223 is an equidigital number, since it uses as much as digits as its factorization.

251455554223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200000, while the sum is 43.

The spelling of 251455554223 in words is "two hundred fifty-one billion, four hundred fifty-five million, five hundred fifty-four thousand, two hundred twenty-three".