31425542 has 8 divisors (see below), whose sum is σ = 47201616. Its totient is φ = 15691672.

The previous prime is 31425539. The next prime is 31425547. The reversal of 31425542 is 24552413.

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 not an unprimeable number, because it can be changed into a prime (31425547) 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, 8618 + ... + 11709.

It is an arithmetic number, because the mean of its divisors is an integer number (5900202).

Almost surely, 2^31425542 is an apocalyptic number.

31425542 is a deficient number, since it is larger than the sum of its proper divisors (15776074).

31425542 is a wasteful number, since it uses less digits than its factorization.

31425542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21102.

The product of its digits is 4800, while the sum is 26.

The square root of 31425542 is about 5605.8489098441. The cubic root of 31425542 is about 315.5689457296.

Adding to 31425542 its reverse (24552413), we get a palindrome (55977955).

The spelling of 31425542 in words is "thirty-one million, four hundred twenty-five thousand, five hundred forty-two".