55121453 has 4 divisors (see below), whose sum is σ = 56611260. Its totient is φ = 53631648.

The previous prime is 55121449. The next prime is 55121467. The reversal of 55121453 is 35412155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35412155 = 5 ⋅7082431.

It can be written as a sum of positive squares in 2 ways, for example, as 53042089 + 2079364 = 7283^2 + 1442^2 .

It is not a de Polignac number, because 55121453 - 2² = 55121449 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121483) 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, 744848 + ... + 744921.

It is an arithmetic number, because the mean of its divisors is an integer number (14152815).

Almost surely, 2^55121453 is an apocalyptic number.

It is an amenable number.

55121453 is a deficient number, since it is larger than the sum of its proper divisors (1489807).

55121453 is a wasteful number, since it uses less digits than its factorization.

55121453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489806.

The product of its digits is 3000, while the sum is 26.

The square root of 55121453 is about 7424.3823312111. The cubic root of 55121453 is about 380.5749675438.

The spelling of 55121453 in words is "fifty-five million, one hundred twenty-one thousand, four hundred fifty-three".