54195121 has 4 divisors (see below), whose sum is σ = 55659892. Its totient is φ = 52730352.

The previous prime is 54195109. The next prime is 54195131. The reversal of 54195121 is 12159145.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45427600 + 8767521 = 6740^2 + 2961^2 .

It is a cyclic number.

It is not a de Polignac number, because 54195121 - 2⁷ = 54194993 is a prime.

It is a super-2 number, since 2×54195121² = 5874222280409282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54195121.

It is not an unprimeable number, because it can be changed into a prime (54195131) 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, 732330 + ... + 732403.

It is an arithmetic number, because the mean of its divisors is an integer number (13914973).

Almost surely, 2^54195121 is an apocalyptic number.

It is an amenable number.

54195121 is a deficient number, since it is larger than the sum of its proper divisors (1464771).

54195121 is a wasteful number, since it uses less digits than its factorization.

54195121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464770.

The product of its digits is 1800, while the sum is 28.

The square root of 54195121 is about 7361.7335594274. The cubic root of 54195121 is about 378.4310215417.

The spelling of 54195121 in words is "fifty-four million, one hundred ninety-five thousand, one hundred twenty-one".