31545142 has 8 divisors (see below), whose sum is σ = 47413296. Its totient is φ = 15740712.

The previous prime is 31545119. The next prime is 31545181. The reversal of 31545142 is 24154513.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14673 + ... + 16684.

It is an arithmetic number, because the mean of its divisors is an integer number (5926662).

Almost surely, 2^31545142 is an apocalyptic number.

31545142 is a deficient number, since it is larger than the sum of its proper divisors (15868154).

31545142 is a wasteful number, since it uses less digits than its factorization.

31545142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31862.

The product of its digits is 2400, while the sum is 25.

The square root of 31545142 is about 5616.5062093796. The cubic root of 31545142 is about 315.9687719501.

Adding to 31545142 its reverse (24154513), we get a palindrome (55699655).

The spelling of 31545142 in words is "thirty-one million, five hundred forty-five thousand, one hundred forty-two".