253221511397 has 2 divisors, whose sum is σ = 253221511398. Its totient is φ = 253221511396.

The previous prime is 253221511379. The next prime is 253221511469. The reversal of 253221511397 is 793115122352.

Together with previous prime (253221511379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201660272356 + 51561239041 = 449066^2 + 227071^2 .

It is a cyclic number.

It is not a de Polignac number, because 253221511397 - 2⁸ = 253221511141 is a prime.

It is a super-2 number, since 2×253221511397² (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 (253221511327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126610755698 + 126610755699.

It is an arithmetic number, because the mean of its divisors is an integer number (126610755699).

Almost surely, 2^253221511397 is an apocalyptic number.

It is an amenable number.

253221511397 is a deficient number, since it is larger than the sum of its proper divisors (1).

253221511397 is an equidigital number, since it uses as much as digits as its factorization.

253221511397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The spelling of 253221511397 in words is "two hundred fifty-three billion, two hundred twenty-one million, five hundred eleven thousand, three hundred ninety-seven".