55147939 has 16 divisors (see below), whose sum is σ = 69592320. Its totient is φ = 42449760.

The previous prime is 55147921. The next prime is 55147943. The reversal of 55147939 is 93974155.

It is a cyclic number.

It is not a de Polignac number, because 55147939 - 2⁷ = 55147811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55147895 and 55147904.

It is not an unprimeable number, because it can be changed into a prime (55147979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2077 + ... + 10705.

It is an arithmetic number, because the mean of its divisors is an integer number (4349520).

Almost surely, 2^55147939 is an apocalyptic number.

55147939 is a deficient number, since it is larger than the sum of its proper divisors (14444381).

55147939 is a wasteful number, since it uses less digits than its factorization.

55147939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8730.

The product of its digits is 170100, while the sum is 43.

The square root of 55147939 is about 7426.1658343993. The cubic root of 55147939 is about 380.6359135337.

The spelling of 55147939 in words is "fifty-five million, one hundred forty-seven thousand, nine hundred thirty-nine".