55859139 has 24 divisors (see below), whose sum is σ = 95630080. Its totient is φ = 31918536.

The previous prime is 55859137. The next prime is 55859149. The reversal of 55859139 is 93195855.

55859139 is a `hidden beast` number, since 5 + 58 + 591 + 3 + 9 = 666.

It is not a de Polignac number, because 55859139 - 2¹ = 55859137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55859094 and 55859103.

It is not an unprimeable number, because it can be changed into a prime (55859131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14719 + ... + 18120.

Almost surely, 2^55859139 is an apocalyptic number.

55859139 is a deficient number, since it is larger than the sum of its proper divisors (39770941).

55859139 is an equidigital number, since it uses as much as digits as its factorization.

55859139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32861 (or 32849 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 55859139 is about 7473.8971761725. The cubic root of 55859139 is about 382.2651845969.

The spelling of 55859139 in words is "fifty-five million, eight hundred fifty-nine thousand, one hundred thirty-nine".