55139294 has 8 divisors (see below), whose sum is σ = 94524528. Its totient is φ = 23631120.

The previous prime is 55139291. The next prime is 55139321. The reversal of 55139294 is 49293155.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55139291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969247 + ... + 1969274.

It is an arithmetic number, because the mean of its divisors is an integer number (11815566).

Almost surely, 2^55139294 is an apocalyptic number.

55139294 is a deficient number, since it is larger than the sum of its proper divisors (39385234).

55139294 is a wasteful number, since it uses less digits than its factorization.

55139294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938530.

The product of its digits is 48600, while the sum is 38.

The square root of 55139294 is about 7425.5837480968. The cubic root of 55139294 is about 380.6160229781.

The spelling of 55139294 in words is "fifty-five million, one hundred thirty-nine thousand, two hundred ninety-four".