252221511551431 has 2 divisors, whose sum is σ = 252221511551432. Its totient is φ = 252221511551430.

The previous prime is 252221511551413. The next prime is 252221511551437. The reversal of 252221511551431 is 134155115122252.

Together with previous prime (252221511551413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 252221511551431 - 2²¹ = 252221509454279 is a prime.

It is a super-2 number, since 2×252221511551431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252221511551437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126110755775715 + 126110755775716.

It is an arithmetic number, because the mean of its divisors is an integer number (126110755775716).

Almost surely, 2^{252221511551431} is an apocalyptic number.

252221511551431 is a deficient number, since it is larger than the sum of its proper divisors (1).

252221511551431 is an equidigital number, since it uses as much as digits as its factorization.

252221511551431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120000, while the sum is 40.

Adding to 252221511551431 its reverse (134155115122252), we get a palindrome (386376626673683).

The spelling of 252221511551431 in words is "two hundred fifty-two trillion, two hundred twenty-one billion, five hundred eleven million, five hundred fifty-one thousand, four hundred thirty-one".