551022506402 has 4 divisors (see below), whose sum is σ = 826533759606. Its totient is φ = 275511253200.

The previous prime is 551022506383. The next prime is 551022506429. The reversal of 551022506402 is 204605220155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 308703583321 + 242318923081 = 555611^2 + 492259^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137755626599 + ... + 137755626602.

Almost surely, 2^551022506402 is an apocalyptic number.

551022506402 is a deficient number, since it is larger than the sum of its proper divisors (275511253204).

551022506402 is a wasteful number, since it uses less digits than its factorization.

551022506402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275511253203.

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 551022506402 its reverse (204605220155), we get a palindrome (755627726557).

The spelling of 551022506402 in words is "five hundred fifty-one billion, twenty-two million, five hundred six thousand, four hundred two".