551403491 has 8 divisors (see below), whose sum is σ = 568351344. Its totient is φ = 534643200.

The previous prime is 551403481. The next prime is 551403493. The reversal of 551403491 is 194304155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551403491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551403493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40910 + ... + 52691.

It is an arithmetic number, because the mean of its divisors is an integer number (71043918).

Almost surely, 2^551403491 is an apocalyptic number.

551403491 is a deficient number, since it is larger than the sum of its proper divisors (16947853).

551403491 is a wasteful number, since it uses less digits than its factorization.

551403491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93781.

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

The square root of 551403491 is about 23481.9822630033. The cubic root of 551403491 is about 820.0175938125.

The spelling of 551403491 in words is "five hundred fifty-one million, four hundred three thousand, four hundred ninety-one".