551404402 has 4 divisors (see below), whose sum is σ = 827106606. Its totient is φ = 275702200.

The previous prime is 551404391. The next prime is 551404417. The reversal of 551404402 is 204404155.

It is a happy number.

551404402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 541911841 + 9492561 = 23279^2 + 3081^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137851099 + ... + 137851102.

Almost surely, 2^551404402 is an apocalyptic number.

551404402 is a deficient number, since it is larger than the sum of its proper divisors (275702204).

551404402 is a wasteful number, since it uses less digits than its factorization.

551404402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275702203.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 551404402 is about 23482.0016608465. The cubic root of 551404402 is about 820.0180454089.

Adding to 551404402 its reverse (204404155), we get a palindrome (755808557).

The spelling of 551404402 in words is "five hundred fifty-one million, four hundred four thousand, four hundred two".