55136129 has 8 divisors (see below), whose sum is σ = 57704832. Its totient is φ = 52581760.

The previous prime is 55136093. The next prime is 55136143. The reversal of 55136129 is 92163155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55136129 - 2¹⁶ = 55070593 is a prime.

It is a super-2 number, since 2×55136129² = 6079985442209282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55136095 and 55136104.

It is not an unprimeable number, because it can be changed into a prime (55136189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4724 + ... + 11514.

It is an arithmetic number, because the mean of its divisors is an integer number (7213104).

Almost surely, 2^55136129 is an apocalyptic number.

It is an amenable number.

55136129 is a deficient number, since it is larger than the sum of its proper divisors (2568703).

55136129 is a wasteful number, since it uses less digits than its factorization.

55136129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7167.

The product of its digits is 8100, while the sum is 32.

The square root of 55136129 is about 7425.3706304803. The cubic root of 55136129 is about 380.6087403751.

The spelling of 55136129 in words is "fifty-five million, one hundred thirty-six thousand, one hundred twenty-nine".