54243657 has 24 divisors (see below), whose sum is σ = 84945224. Its totient is φ = 33156864.

The previous prime is 54243649. The next prime is 54243667. The reversal of 54243657 is 75634245.

It can be written as a sum of positive squares in 4 ways, for example, as 3606201 + 50637456 = 1899^2 + 7116^2 .

It is not a de Polignac number, because 54243657 - 2³ = 54243649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54243667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16893 + ... + 19845.

Almost surely, 2^54243657 is an apocalyptic number.

It is an amenable number.

54243657 is a deficient number, since it is larger than the sum of its proper divisors (30701567).

54243657 is a wasteful number, since it uses less digits than its factorization.

54243657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129 (or 3126 counting only the distinct ones).

The product of its digits is 100800, while the sum is 36.

The square root of 54243657 is about 7365.0293278438. The cubic root of 54243657 is about 378.5439594302.

The spelling of 54243657 in words is "fifty-four million, two hundred forty-three thousand, six hundred fifty-seven".