100553431 has 4 divisors (see below), whose sum is σ = 109694664. Its totient is φ = 91412200.

The previous prime is 100553423. The next prime is 100553473. The reversal of 100553431 is 134355001.

It is a happy number.

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

It is not a de Polignac number, because 100553431 - 2³ = 100553423 is a prime.

It is a super-2 number, since 2×100553431² = 20221984971743522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100553731) 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, 4570600 + ... + 4570621.

It is an arithmetic number, because the mean of its divisors is an integer number (27423666).

Almost surely, 2^100553431 is an apocalyptic number.

100553431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100553431 is a deficient number, since it is larger than the sum of its proper divisors (9141233).

100553431 is an equidigital number, since it uses as much as digits as its factorization.

100553431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141232.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 100553431 is about 10027.6333698436. The cubic root of 100553431 is about 465.0135749689.

The spelling of 100553431 in words is "one hundred million, five hundred fifty-three thousand, four hundred thirty-one".