551215430403 has 16 divisors (see below), whose sum is σ = 801790291200. Its totient is φ = 334060627680.

The previous prime is 551215430347. The next prime is 551215430449. The reversal of 551215430403 is 304034512155.

It is not a de Polignac number, because 551215430403 - 2¹³ = 551215422211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (551215430203) 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, 1075893 + ... + 1503321.

It is an arithmetic number, because the mean of its divisors is an integer number (50111893200).

Almost surely, 2^551215430403 is an apocalyptic number.

551215430403 is a deficient number, since it is larger than the sum of its proper divisors (250574860797).

551215430403 is a wasteful number, since it uses less digits than its factorization.

551215430403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466522.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 551215430403 its reverse (304034512155), we get a palindrome (855249942558).

The spelling of 551215430403 in words is "five hundred fifty-one billion, two hundred fifteen million, four hundred thirty thousand, four hundred three".