55115739 has 18 divisors (see below), whose sum is σ = 92610180. Its totient is φ = 31494456.

The previous prime is 55115729. The next prime is 55115743. The reversal of 55115739 is 93751155.

It is not a de Polignac number, because 55115739 - 2⁷ = 55115611 is a prime.

It is a super-2 number, since 2×55115739² = 6075489371032242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55115729) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 62049 + ... + 62930.

It is an arithmetic number, because the mean of its divisors is an integer number (5145010).

Almost surely, 2^55115739 is an apocalyptic number.

55115739 is a deficient number, since it is larger than the sum of its proper divisors (37494441).

55115739 is a wasteful number, since it uses less digits than its factorization.

55115739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124999 (or 124989 counting only the distinct ones).

The product of its digits is 23625, while the sum is 36.

The square root of 55115739 is about 7423.9975080815. The cubic root of 55115739 is about 380.5618167021.

It can be divided in two parts, 551 and 15739, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 55115739 in words is "fifty-five million, one hundred fifteen thousand, seven hundred thirty-nine".