253026366421 has 2 divisors, whose sum is σ = 253026366422. Its totient is φ = 253026366420.

The previous prime is 253026366413. The next prime is 253026366427. The reversal of 253026366421 is 124663620352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143763063921 + 109263302500 = 379161^2 + 330550^2 .

It is a cyclic number.

It is not a de Polignac number, because 253026366421 - 2³ = 253026366413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253026366427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126513183210 + 126513183211.

It is an arithmetic number, because the mean of its divisors is an integer number (126513183211).

Almost surely, 2^253026366421 is an apocalyptic number.

It is an amenable number.

253026366421 is a deficient number, since it is larger than the sum of its proper divisors (1).

253026366421 is an equidigital number, since it uses as much as digits as its factorization.

253026366421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 253026366421 its reverse (124663620352), we get a palindrome (377689986773).

The spelling of 253026366421 in words is "two hundred fifty-three billion, twenty-six million, three hundred sixty-six thousand, four hundred twenty-one".