31661342 has 4 divisors (see below), whose sum is σ = 47492016. Its totient is φ = 15830670.

The previous prime is 31661309. The next prime is 31661351. The reversal of 31661342 is 24316613.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7915334 + ... + 7915337.

It is an arithmetic number, because the mean of its divisors is an integer number (11873004).

Almost surely, 2^31661342 is an apocalyptic number.

31661342 is a deficient number, since it is larger than the sum of its proper divisors (15830674).

31661342 is a wasteful number, since it uses less digits than its factorization.

31661342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15830673.

The product of its digits is 2592, while the sum is 26.

The square root of 31661342 is about 5626.8412097730. The cubic root of 31661342 is about 316.3562651219.

Adding to 31661342 its reverse (24316613), we get a palindrome (55977955).

The spelling of 31661342 in words is "thirty-one million, six hundred sixty-one thousand, three hundred forty-two".