55018402 has 4 divisors (see below), whose sum is σ = 82527606. Its totient is φ = 27509200.

The previous prime is 55018393. The next prime is 55018417. The reversal of 55018402 is 20481055.

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., 54922921 + 95481 = 7411^2 + 309^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13754599 + ... + 13754602.

Almost surely, 2^55018402 is an apocalyptic number.

55018402 is a deficient number, since it is larger than the sum of its proper divisors (27509204).

55018402 is a wasteful number, since it uses less digits than its factorization.

55018402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27509203.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 55018402 is about 7417.4390459241. The cubic root of 55018402 is about 380.3376546384.

Adding to 55018402 its reverse (20481055), we get a palindrome (75499457).

The spelling of 55018402 in words is "fifty-five million, eighteen thousand, four hundred two".