1101055431 has 24 divisors (see below), whose sum is σ = 1711269504. Its totient is φ = 627881520.

The previous prime is 1101055391. The next prime is 1101055447. The reversal of 1101055431 is 1345501011.

It is a happy number.

It is not a de Polignac number, because 1101055431 - 2⁶ = 1101055367 is a prime.

It is a super-2 number, since 2×1101055431² = 2424646124269191522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1101055398 and 1101055407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101055331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66496 + ... + 81386.

It is an arithmetic number, because the mean of its divisors is an integer number (71302896).

Almost surely, 2^1101055431 is an apocalyptic number.

1101055431 is a deficient number, since it is larger than the sum of its proper divisors (610214073).

1101055431 is a wasteful number, since it uses less digits than its factorization.

1101055431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15411 (or 15404 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1101055431 is about 33182.1553097444. The cubic root of 1101055431 is about 1032.6101615678.

Adding to 1101055431 its reverse (1345501011), we get a palindrome (2446556442).

The spelling of 1101055431 in words is "one billion, one hundred one million, fifty-five thousand, four hundred thirty-one".