31242886 has 8 divisors (see below), whose sum is σ = 47013120. Its totient is φ = 15571848.

The previous prime is 31242881. The next prime is 31242899. The reversal of 31242886 is 68824213.

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

It is a super-2 number, since 2×31242886² = 1952235851217992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242881) 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, 24006 + ... + 25273.

It is an arithmetic number, because the mean of its divisors is an integer number (5876640).

Almost surely, 2^31242886 is an apocalyptic number.

31242886 is a deficient number, since it is larger than the sum of its proper divisors (15770234).

31242886 is a wasteful number, since it uses less digits than its factorization.

31242886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49598.

The product of its digits is 18432, while the sum is 34.

The square root of 31242886 is about 5589.5336120288. The cubic root of 31242886 is about 314.9563591175.

The spelling of 31242886 in words is "thirty-one million, two hundred forty-two thousand, eight hundred eighty-six".