551561502 has 16 divisors (see below), whose sum is σ = 1104095232. Its totient is φ = 183691800.

The previous prime is 551561467. The next prime is 551561533. The reversal of 551561502 is 205165155.

It is a self number, because there is not a number n which added to its sum of digits gives 551561502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33028 + ... + 46839.

It is an arithmetic number, because the mean of its divisors is an integer number (69005952).

Almost surely, 2^551561502 is an apocalyptic number.

551561502 is an abundant number, since it is smaller than the sum of its proper divisors (552533730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551561502 is a wasteful number, since it uses less digits than its factorization.

551561502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81023.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 551561502 is about 23485.3465377882. The cubic root of 551561502 is about 820.0959148166.

The spelling of 551561502 in words is "five hundred fifty-one million, five hundred sixty-one thousand, five hundred two".