53573268421 has 2 divisors, whose sum is σ = 53573268422. Its totient is φ = 53573268420.

The previous prime is 53573268367. The next prime is 53573268431. The reversal of 53573268421 is 12486237535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39457452321 + 14115816100 = 198639^2 + 118810^2 .

It is a cyclic number.

It is not a de Polignac number, because 53573268421 - 2¹⁷ = 53573137349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53573268431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26786634210 + 26786634211.

It is an arithmetic number, because the mean of its divisors is an integer number (26786634211).

Almost surely, 2^53573268421 is an apocalyptic number.

It is an amenable number.

53573268421 is a deficient number, since it is larger than the sum of its proper divisors (1).

53573268421 is an equidigital number, since it uses as much as digits as its factorization.

53573268421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 46.

The spelling of 53573268421 in words is "fifty-three billion, five hundred seventy-three million, two hundred sixty-eight thousand, four hundred twenty-one".