257162022421 has 2 divisors, whose sum is σ = 257162022422. Its totient is φ = 257162022420.

The previous prime is 257162022391. The next prime is 257162022479. The reversal of 257162022421 is 124220261752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246467567025 + 10694455396 = 496455^2 + 103414^2 .

It is a cyclic number.

It is not a de Polignac number, because 257162022421 - 2¹⁵ = 257161989653 is a prime.

It is a super-2 number, since 2×257162022421² (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 (257162622421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128581011210 + 128581011211.

It is an arithmetic number, because the mean of its divisors is an integer number (128581011211).

Almost surely, 2^257162022421 is an apocalyptic number.

It is an amenable number.

257162022421 is a deficient number, since it is larger than the sum of its proper divisors (1).

257162022421 is an equidigital number, since it uses as much as digits as its factorization.

257162022421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 257162022421 in words is "two hundred fifty-seven billion, one hundred sixty-two million, twenty-two thousand, four hundred twenty-one".