55129394 has 4 divisors (see below), whose sum is σ = 82694094. Its totient is φ = 27564696.

The previous prime is 55129387. The next prime is 55129427. The reversal of 55129394 is 49392155.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41770369 + 13359025 = 6463^2 + 3655^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13782347 + ... + 13782350.

Almost surely, 2^55129394 is an apocalyptic number.

55129394 is a deficient number, since it is larger than the sum of its proper divisors (27564700).

55129394 is a wasteful number, since it uses less digits than its factorization.

55129394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27564699.

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

The square root of 55129394 is about 7424.9171039144. The cubic root of 55129394 is about 380.5932423445.

The spelling of 55129394 in words is "fifty-five million, one hundred twenty-nine thousand, three hundred ninety-four".