55002638 has 4 divisors (see below), whose sum is σ = 82503960. Its totient is φ = 27501318.

The previous prime is 55002631. The next prime is 55002677. The reversal of 55002638 is 83620055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83620055 = 5 ⋅16724011.

It is a self number, because there is not a number n which added to its sum of digits gives 55002638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55002631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13750658 + ... + 13750661.

It is an arithmetic number, because the mean of its divisors is an integer number (20625990).

Almost surely, 2^55002638 is an apocalyptic number.

55002638 is a deficient number, since it is larger than the sum of its proper divisors (27501322).

55002638 is a wasteful number, since it uses less digits than its factorization.

55002638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27501321.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55002638 is about 7416.3763388868. The cubic root of 55002638 is about 380.3013260932.

The spelling of 55002638 in words is "fifty-five million, two thousand, six hundred thirty-eight".