55039963 has 4 divisors (see below), whose sum is σ = 60043608. Its totient is φ = 50036320.

The previous prime is 55039951. The next prime is 55039967. The reversal of 55039963 is 36993055.

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

It is a cyclic number.

It is not a de Polignac number, because 55039963 - 2¹⁷ = 54908891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55039967) 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, 2501806 + ... + 2501827.

It is an arithmetic number, because the mean of its divisors is an integer number (15010902).

Almost surely, 2^55039963 is an apocalyptic number.

55039963 is a deficient number, since it is larger than the sum of its proper divisors (5003645).

55039963 is a wasteful number, since it uses less digits than its factorization.

55039963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003644.

The product of its (nonzero) digits is 109350, while the sum is 40.

The square root of 55039963 is about 7418.8923027633. The cubic root of 55039963 is about 380.3873312853.

The spelling of 55039963 in words is "fifty-five million, thirty-nine thousand, nine hundred sixty-three".