551404426 has 4 divisors (see below), whose sum is σ = 827106642. Its totient is φ = 275702212.

The previous prime is 551404417. The next prime is 551404433. The reversal of 551404426 is 624404155.

It is a happy number.

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., 414163201 + 137241225 = 20351^2 + 11715^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137851105 + ... + 137851108.

Almost surely, 2^551404426 is an apocalyptic number.

551404426 is a deficient number, since it is larger than the sum of its proper divisors (275702216).

551404426 is a wasteful number, since it uses less digits than its factorization.

551404426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275702215.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 551404426 is about 23482.0021718762. The cubic root of 551404426 is about 820.0180573061.

The spelling of 551404426 in words is "five hundred fifty-one million, four hundred four thousand, four hundred twenty-six".