54157729 has 4 divisors (see below), whose sum is σ = 54663984. Its totient is φ = 53651476.

The previous prime is 54157721. The next prime is 54157759. The reversal of 54157729 is 92775145.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92775145 = 5 ⋅18555029.

It is a cyclic number.

It is not a de Polignac number, because 54157729 - 2³ = 54157721 is a prime.

It is a super-2 number, since 2×54157729² = 5866119220874882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54157691 and 54157700.

It is not an unprimeable number, because it can be changed into a prime (54157721) 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, 252967 + ... + 253180.

It is an arithmetic number, because the mean of its divisors is an integer number (13665996).

Almost surely, 2^54157729 is an apocalyptic number.

It is an amenable number.

54157729 is a deficient number, since it is larger than the sum of its proper divisors (506255).

54157729 is a wasteful number, since it uses less digits than its factorization.

54157729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506254.

The product of its digits is 88200, while the sum is 40.

The square root of 54157729 is about 7359.1935020082. The cubic root of 54157729 is about 378.3439685126.

The spelling of 54157729 in words is "fifty-four million, one hundred fifty-seven thousand, seven hundred twenty-nine".