551122394 has 4 divisors (see below), whose sum is σ = 826683594. Its totient is φ = 275561196.

The previous prime is 551122391. The next prime is 551122399. The reversal of 551122394 is 493221155.

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., 407434225 + 143688169 = 20185^2 + 11987^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 551122394.

It is not an unprimeable number, because it can be changed into a prime (551122391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137780597 + ... + 137780600.

Almost surely, 2^551122394 is an apocalyptic number.

551122394 is a deficient number, since it is larger than the sum of its proper divisors (275561200).

551122394 is a wasteful number, since it uses less digits than its factorization.

551122394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275561199.

The product of its digits is 10800, while the sum is 32.

The square root of 551122394 is about 23475.9961237005. The cubic root of 551122394 is about 819.8782260176.

The spelling of 551122394 in words is "five hundred fifty-one million, one hundred twenty-two thousand, three hundred ninety-four".