251121252373 has 2 divisors, whose sum is σ = 251121252374. Its totient is φ = 251121252372.

The previous prime is 251121252311. The next prime is 251121252379. The reversal of 251121252373 is 373252121152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148299699409 + 102821552964 = 385097^2 + 320658^2 .

It is a cyclic number.

It is not a de Polignac number, because 251121252373 - 2¹⁷ = 251121121301 is a prime.

It is a super-2 number, since 2×251121252373² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251121252379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125560626186 + 125560626187.

It is an arithmetic number, because the mean of its divisors is an integer number (125560626187).

Almost surely, 2^251121252373 is an apocalyptic number.

It is an amenable number.

251121252373 is a deficient number, since it is larger than the sum of its proper divisors (1).

251121252373 is an equidigital number, since it uses as much as digits as its factorization.

251121252373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The spelling of 251121252373 in words is "two hundred fifty-one billion, one hundred twenty-one million, two hundred fifty-two thousand, three hundred seventy-three".