55249138 has 16 divisors (see below), whose sum is σ = 96128064. Its totient is φ = 23324400.

The previous prime is 55249123. The next prime is 55249171. The reversal of 55249138 is 83194255.

It is a junction number, because it is equal to n+sod(n) for n = 55249097 and 55249106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28513 + ... + 30388.

It is an arithmetic number, because the mean of its divisors is an integer number (6008004).

Almost surely, 2^55249138 is an apocalyptic number.

55249138 is a deficient number, since it is larger than the sum of its proper divisors (40878926).

55249138 is a wasteful number, since it uses less digits than its factorization.

55249138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58977.

The product of its digits is 43200, while the sum is 37.

The square root of 55249138 is about 7432.9763890382. The cubic root of 55249138 is about 380.8685993876.

The spelling of 55249138 in words is "fifty-five million, two hundred forty-nine thousand, one hundred thirty-eight".