551215402 has 16 divisors (see below), whose sum is σ = 855661824. Its totient is φ = 266040000.

The previous prime is 551215373. The next prime is 551215411. The reversal of 551215402 is 204512155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13777 + ... + 35947.

It is an arithmetic number, because the mean of its divisors is an integer number (53478864).

Almost surely, 2^551215402 is an apocalyptic number.

551215402 is a deficient number, since it is larger than the sum of its proper divisors (304446422).

551215402 is a wasteful number, since it uses less digits than its factorization.

551215402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22605.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 551215402 is about 23477.9769571401. The cubic root of 551215402 is about 819.9243445965.

Adding to 551215402 its reverse (204512155), we get a palindrome (755727557).

The spelling of 551215402 in words is "five hundred fifty-one million, two hundred fifteen thousand, four hundred two".