550400501 has 4 divisors (see below), whose sum is σ = 629029152. Its totient is φ = 471771852.

The previous prime is 550400497. The next prime is 550400507. The reversal of 550400501 is 105004055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 550400501 - 2² = 550400497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550400507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39314315 + ... + 39314328.

It is an arithmetic number, because the mean of its divisors is an integer number (157257288).

Almost surely, 2^550400501 is an apocalyptic number.

It is an amenable number.

550400501 is a deficient number, since it is larger than the sum of its proper divisors (78628651).

550400501 is an equidigital number, since it uses as much as digits as its factorization.

550400501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78628650.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 550400501 is about 23460.6159552557. The cubic root of 550400501 is about 819.5200944624.

Adding to 550400501 its reverse (105004055), we get a palindrome (655404556).

The spelling of 550400501 in words is "five hundred fifty million, four hundred thousand, five hundred one".