421563448513 has 2 divisors, whose sum is σ = 421563448514. Its totient is φ = 421563448512.

The previous prime is 421563448477. The next prime is 421563448541. The reversal of 421563448513 is 315844365124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417843302464 + 3720146049 = 646408^2 + 60993^2 .

It is a cyclic number.

It is not a de Polignac number, because 421563448513 - 2³³ = 412973513921 is a prime.

It is a super-2 number, since 2×421563448513² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421563448573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210781724256 + 210781724257.

It is an arithmetic number, because the mean of its divisors is an integer number (210781724257).

Almost surely, 2^421563448513 is an apocalyptic number.

It is an amenable number.

421563448513 is a deficient number, since it is larger than the sum of its proper divisors (1).

421563448513 is an equidigital number, since it uses as much as digits as its factorization.

421563448513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1382400, while the sum is 46.

The spelling of 421563448513 in words is "four hundred twenty-one billion, five hundred sixty-three million, four hundred forty-eight thousand, five hundred thirteen".