516401553 has 4 divisors (see below), whose sum is σ = 688535408. Its totient is φ = 344267700.

The previous prime is 516401477. The next prime is 516401569. The reversal of 516401553 is 355104615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 516401553 - 2⁸ = 516401297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 516401553.

It is not an unprimeable number, because it can be changed into a prime (516401573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86066923 + ... + 86066928.

It is an arithmetic number, because the mean of its divisors is an integer number (172133852).

Almost surely, 2^516401553 is an apocalyptic number.

It is an amenable number.

516401553 is a deficient number, since it is larger than the sum of its proper divisors (172133855).

516401553 is a wasteful number, since it uses less digits than its factorization.

516401553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172133854.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 516401553 is about 22724.4703568642. The cubic root of 516401553 is about 802.2859374121.

The spelling of 516401553 in words is "five hundred sixteen million, four hundred one thousand, five hundred fifty-three".