551313205 has 4 divisors (see below), whose sum is σ = 661575852. Its totient is φ = 441050560.

The previous prime is 551313187. The next prime is 551313211. The reversal of 551313205 is 502313155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502313155 = 5 ⋅100462631.

It can be written as a sum of positive squares in 2 ways, for example, as 191490244 + 359822961 = 13838^2 + 18969^2 .

It is not a de Polignac number, because 551313205 - 2⁵ = 551313173 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 551313205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55131316 + ... + 55131325.

It is an arithmetic number, because the mean of its divisors is an integer number (165393963).

Almost surely, 2^551313205 is an apocalyptic number.

It is an amenable number.

551313205 is a deficient number, since it is larger than the sum of its proper divisors (110262647).

551313205 is a wasteful number, since it uses less digits than its factorization.

551313205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110262646.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 551313205 is about 23480.0597316106. The cubic root of 551313205 is about 819.9728352096.

Subtracting from 551313205 its reverse (502313155), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 551313205 in words is "five hundred fifty-one million, three hundred thirteen thousand, two hundred five".