31425442 has 8 divisors (see below), whose sum is σ = 47219436. Its totient is φ = 15685632.

The previous prime is 31425397. The next prime is 31425461. The reversal of 31425442 is 24452413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28633201 + 2792241 = 5351^2 + 1671^2 .

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

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, 12063 + ... + 14434.

Almost surely, 2^31425442 is an apocalyptic number.

31425442 is a deficient number, since it is larger than the sum of its proper divisors (15793994).

31425442 is a wasteful number, since it uses less digits than its factorization.

31425442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27092.

The product of its digits is 3840, while the sum is 25.

The square root of 31425442 is about 5605.8399905813. The cubic root of 31425442 is about 315.5686110026.

Adding to 31425442 its reverse (24452413), we get a palindrome (55877855).

The spelling of 31425442 in words is "thirty-one million, four hundred twenty-five thousand, four hundred forty-two".