109139551 has 4 divisors (see below), whose sum is σ = 109186704. Its totient is φ = 109092400.

The previous prime is 109139519. The next prime is 109139579. The reversal of 109139551 is 155931901.

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

It is a cyclic number.

It is not a de Polignac number, because 109139551 - 2⁵ = 109139519 is a prime.

It is a super-2 number, since 2×109139551² = 23822883184963202, 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 (109139651) 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, 19915 + ... + 24796.

It is an arithmetic number, because the mean of its divisors is an integer number (27296676).

Almost surely, 2^109139551 is an apocalyptic number.

109139551 is a deficient number, since it is larger than the sum of its proper divisors (47153).

109139551 is an equidigital number, since it uses as much as digits as its factorization.

109139551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47152.

The product of its (nonzero) digits is 6075, while the sum is 34.

The square root of 109139551 is about 10446.9876519502. The cubic root of 109139551 is about 477.8893889822.

The spelling of 109139551 in words is "one hundred nine million, one hundred thirty-nine thousand, five hundred fifty-one".