54157121 has 4 divisors (see below), whose sum is σ = 57342852. Its totient is φ = 50971392.

The previous prime is 54157099. The next prime is 54157127. The reversal of 54157121 is 12175145.

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 30924721 + 23232400 = 5561^2 + 4820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54157121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54157127) 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, 1592840 + ... + 1592873.

It is an arithmetic number, because the mean of its divisors is an integer number (14335713).

Almost surely, 2^54157121 is an apocalyptic number.

It is an amenable number.

54157121 is a deficient number, since it is larger than the sum of its proper divisors (3185731).

54157121 is a wasteful number, since it uses less digits than its factorization.

54157121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3185730.

The product of its digits is 1400, while the sum is 26.

The square root of 54157121 is about 7359.1521930179. The cubic root of 54157121 is about 378.3425526851.

The spelling of 54157121 in words is "fifty-four million, one hundred fifty-seven thousand, one hundred twenty-one".