551436641 has 16 divisors (see below), whose sum is σ = 660470400. Its totient is φ = 459874800.

The previous prime is 551436637. The next prime is 551436647. The reversal of 551436641 is 146634155.

It is not a de Polignac number, because 551436641 - 2² = 551436637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551436647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9035 + ... + 34416.

It is an arithmetic number, because the mean of its divisors is an integer number (41279400).

Almost surely, 2^551436641 is an apocalyptic number.

It is an amenable number.

551436641 is a deficient number, since it is larger than the sum of its proper divisors (109033759).

551436641 is an equidigital number, since it uses as much as digits as its factorization.

551436641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43509 (or 43495 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 551436641 is about 23482.6881127353. The cubic root of 551436641 is about 820.0340264484.

The spelling of 551436641 in words is "five hundred fifty-one million, four hundred thirty-six thousand, six hundred forty-one".