551201331 has 4 divisors (see below), whose sum is σ = 734935112. Its totient is φ = 367467552.

The previous prime is 551201327. The next prime is 551201333. The reversal of 551201331 is 133102155.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 551201331 - 2² = 551201327 is a prime.

It is a super-2 number, since 2×551201331² = 607645814592343122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551201298 and 551201307.

It is not an unprimeable number, because it can be changed into a prime (551201333) 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, 91866886 + ... + 91866891.

It is an arithmetic number, because the mean of its divisors is an integer number (183733778).

Almost surely, 2^551201331 is an apocalyptic number.

551201331 is a deficient number, since it is larger than the sum of its proper divisors (183733781).

551201331 is a wasteful number, since it uses less digits than its factorization.

551201331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183733780.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 551201331 is about 23477.6772914188. The cubic root of 551201331 is about 819.9173677392.

Adding to 551201331 its reverse (133102155), we get a palindrome (684303486).

The spelling of 551201331 in words is "five hundred fifty-one million, two hundred one thousand, three hundred thirty-one".