55139702 has 4 divisors (see below), whose sum is σ = 82709556. Its totient is φ = 27569850.

The previous prime is 55139681. The next prime is 55139719. The reversal of 55139702 is 20793155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20793155 = 5 ⋅4158631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13784924 + ... + 13784927.

It is an arithmetic number, because the mean of its divisors is an integer number (20677389).

Almost surely, 2^55139702 is an apocalyptic number.

55139702 is a deficient number, since it is larger than the sum of its proper divisors (27569854).

55139702 is a wasteful number, since it uses less digits than its factorization.

55139702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27569853.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 55139702 is about 7425.6112206336. The cubic root of 55139702 is about 380.6169617578.

The spelling of 55139702 in words is "fifty-five million, one hundred thirty-nine thousand, seven hundred two".