51542 has 4 divisors (see below), whose sum is σ = 77316. Its totient is φ = 25770.

The previous prime is 51539. The next prime is 51551. The reversal of 51542 is 24515.

51542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24515 = 5 ⋅4903.

It is a super-3 number, since 3×51542³ = 410775993336264, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12884 + ... + 12887.

It is an arithmetic number, because the mean of its divisors is an integer number (19329).

2⁵¹⁵⁴² is an apocalyptic number.

51542 is a deficient number, since it is larger than the sum of its proper divisors (25774).

51542 is a wasteful number, since it uses less digits than its factorization.

51542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25773.

The product of its digits is 200, while the sum is 17.

The square root of 51542 is about 227.0286325555. The cubic root of 51542 is about 37.2152055617.

The spelling of 51542 in words is "fifty-one thousand, five hundred forty-two".