11551100431 has 8 divisors (see below), whose sum is σ = 12562812864. Its totient is φ = 10556983200.

The previous prime is 11551100389. The next prime is 11551100447. The reversal of 11551100431 is 13400115511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11551100431 - 2¹⁵ = 11551067663 is a prime.

It is a super-2 number, since 2×11551100431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551100531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4397431 + ... + 4400056.

It is an arithmetic number, because the mean of its divisors is an integer number (1570351608).

Almost surely, 2^11551100431 is an apocalyptic number.

11551100431 is a deficient number, since it is larger than the sum of its proper divisors (1011712433).

11551100431 is a wasteful number, since it uses less digits than its factorization.

11551100431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8797601.

The product of its (nonzero) digits is 300, while the sum is 22.

Adding to 11551100431 its reverse (13400115511), we get a palindrome (24951215942).

The spelling of 11551100431 in words is "eleven billion, five hundred fifty-one million, one hundred thousand, four hundred thirty-one".