251438053 has 2 divisors, whose sum is σ = 251438054. Its totient is φ = 251438052.

The previous prime is 251437997. The next prime is 251438063. The reversal of 251438053 is 350834152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216178209 + 35259844 = 14703^2 + 5938^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251438053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251438063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125719026 + 125719027.

It is an arithmetic number, because the mean of its divisors is an integer number (125719027).

Almost surely, 2^251438053 is an apocalyptic number.

It is an amenable number.

251438053 is a deficient number, since it is larger than the sum of its proper divisors (1).

251438053 is an equidigital number, since it uses as much as digits as its factorization.

251438053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 251438053 is about 15856.7983212249. The cubic root of 251438053 is about 631.1661051399.

The spelling of 251438053 in words is "two hundred fifty-one million, four hundred thirty-eight thousand, fifty-three".