31542 has 16 divisors (see below), whose sum is σ = 72192. Its totient is φ = 9000.

The previous prime is 31541. The next prime is 31543. The reversal of 31542 is 24513.

It is an interprime number because it is at equal distance from previous prime (31541) and next prime (31543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334 + ... + 417.

It is an arithmetic number, because the mean of its divisors is an integer number (4512).

2³¹⁵⁴² is an apocalyptic number.

31542 is an abundant number, since it is smaller than the sum of its proper divisors (40650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36096).

31542 is a wasteful number, since it uses less digits than its factorization.

31542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its digits is 120, while the sum is 15.

The square root of 31542 is about 177.6006756744. The cubic root of 31542 is about 31.5958281092.

The spelling of 31542 in words is "thirty-one thousand, five hundred forty-two".