31442534 has 4 divisors (see below), whose sum is σ = 47163804. Its totient is φ = 15721266.

The previous prime is 31442527. The next prime is 31442539. The reversal of 31442534 is 43524413.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7860632 + ... + 7860635.

It is an arithmetic number, because the mean of its divisors is an integer number (11790951).

Almost surely, 2^31442534 is an apocalyptic number.

31442534 is a deficient number, since it is larger than the sum of its proper divisors (15721270).

31442534 is a wasteful number, since it uses less digits than its factorization.

31442534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15721269.

The product of its digits is 5760, while the sum is 26.

The square root of 31442534 is about 5607.3642649644. The cubic root of 31442534 is about 315.6258122255.

Adding to 31442534 its reverse (43524413), we get a palindrome (74966947).

The spelling of 31442534 in words is "thirty-one million, four hundred forty-two thousand, five hundred thirty-four".