55036121 has 4 divisors (see below), whose sum is σ = 62898432. Its totient is φ = 47173812.

The previous prime is 55036117. The next prime is 55036133. The reversal of 55036121 is 12163055.

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 not a de Polignac number, because 55036121 - 2² = 55036117 is a prime.

It is a super-2 number, since 2×55036121² = 6057949229453282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55036181) 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, 3931145 + ... + 3931158.

It is an arithmetic number, because the mean of its divisors is an integer number (15724608).

Almost surely, 2^55036121 is an apocalyptic number.

It is an amenable number.

55036121 is a deficient number, since it is larger than the sum of its proper divisors (7862311).

55036121 is an equidigital number, since it uses as much as digits as its factorization.

55036121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7862310.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 55036121 is about 7418.6333647108. The cubic root of 55036121 is about 380.3784802490.

Adding to 55036121 its reverse (12163055), we get a palindrome (67199176).

The spelling of 55036121 in words is "fifty-five million, thirty-six thousand, one hundred twenty-one".