55495121 has 4 divisors (see below), whose sum is σ = 60540144. Its totient is φ = 50450100.

The previous prime is 55495103. The next prime is 55495127. The reversal of 55495121 is 12159455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55495121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55495127) 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, 2522495 + ... + 2522516.

It is an arithmetic number, because the mean of its divisors is an integer number (15135036).

Almost surely, 2^55495121 is an apocalyptic number.

It is an amenable number.

55495121 is a deficient number, since it is larger than the sum of its proper divisors (5045023).

55495121 is a wasteful number, since it uses less digits than its factorization.

55495121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5045022.

The product of its digits is 9000, while the sum is 32.

The square root of 55495121 is about 7449.5047486393. The cubic root of 55495121 is about 381.4330033906.

The spelling of 55495121 in words is "fifty-five million, four hundred ninety-five thousand, one hundred twenty-one".