55013990 has 8 divisors (see below), whose sum is σ = 99025200. Its totient is φ = 22005592.

The previous prime is 55013983. The next prime is 55014049. The reversal of 55013990 is 9931055.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2750690 + ... + 2750709.

It is an arithmetic number, because the mean of its divisors is an integer number (12378150).

Almost surely, 2^55013990 is an apocalyptic number.

55013990 is a deficient number, since it is larger than the sum of its proper divisors (44011210).

55013990 is a wasteful number, since it uses less digits than its factorization.

55013990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501406.

The product of its (nonzero) digits is 6075, while the sum is 32.

The square root of 55013990 is about 7417.1416327316. The cubic root of 55013990 is about 380.3274877698.

The spelling of 55013990 in words is "fifty-five million, thirteen thousand, nine hundred ninety".