1100312431 has 4 divisors (see below), whose sum is σ = 1100590632. Its totient is φ = 1100034232.

The previous prime is 1100312407. The next prime is 1100312453. The reversal of 1100312431 is 1342130011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1342130011 = 2357 ⋅569423.

It is a cyclic number.

It is not a de Polignac number, because 1100312431 - 2²⁵ = 1066757999 is a prime.

It is a super-2 number, since 2×1100312431² = 2421374891626259522, which 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 (1100316431) 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, 133081 + ... + 141106.

It is an arithmetic number, because the mean of its divisors is an integer number (275147658).

Almost surely, 2^1100312431 is an apocalyptic number.

1100312431 is a deficient number, since it is larger than the sum of its proper divisors (278201).

1100312431 is an equidigital number, since it uses as much as digits as its factorization.

1100312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278200.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1100312431 is about 33170.9576436979. The cubic root of 1100312431 is about 1032.3778384197.

Adding to 1100312431 its reverse (1342130011), we get a palindrome (2442442442).

The spelling of 1100312431 in words is "one billion, one hundred million, three hundred twelve thousand, four hundred thirty-one".