30551121231 has 16 divisors (see below), whose sum is σ = 44357347200. Its totient is φ = 18630083808.

The previous prime is 30551121119. The next prime is 30551121239. The reversal of 30551121231 is 13212115503.

It is not a de Polignac number, because 30551121231 - 2⁷ = 30551121103 is a prime.

It is a super-2 number, since 2×30551121231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30551121239) 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, 9239461 + ... + 9242766.

It is an arithmetic number, because the mean of its divisors is an integer number (2772334200).

Almost surely, 2^30551121231 is an apocalyptic number.

30551121231 is a deficient number, since it is larger than the sum of its proper divisors (13806225969).

30551121231 is a wasteful number, since it uses less digits than its factorization.

30551121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18482278.

The product of its (nonzero) digits is 900, while the sum is 24.

Adding to 30551121231 its reverse (13212115503), we get a palindrome (43763236734).

The spelling of 30551121231 in words is "thirty billion, five hundred fifty-one million, one hundred twenty-one thousand, two hundred thirty-one".