551555413 has 4 divisors (see below), whose sum is σ = 551652588. Its totient is φ = 551458240.

The previous prime is 551555401. The next prime is 551555443. The reversal of 551555413 is 314555155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 314555155 = 5 ⋅62911031.

It can be written as a sum of positive squares in 2 ways, for example, as 233539524 + 318015889 = 15282^2 + 17833^2 .

It is a cyclic number.

It is not a de Polignac number, because 551555413 - 2²⁵ = 518000981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551555443) 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, 39508 + ... + 51613.

It is an arithmetic number, because the mean of its divisors is an integer number (137913147).

Almost surely, 2^551555413 is an apocalyptic number.

It is an amenable number.

551555413 is a deficient number, since it is larger than the sum of its proper divisors (97175).

551555413 is an equidigital number, since it uses as much as digits as its factorization.

551555413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97174.

The product of its digits is 37500, while the sum is 34.

The square root of 551555413 is about 23485.2169034054. The cubic root of 551555413 is about 820.0928969709.

The spelling of 551555413 in words is "five hundred fifty-one million, five hundred fifty-five thousand, four hundred thirteen".