31303942 has 4 divisors (see below), whose sum is σ = 46955916. Its totient is φ = 15651970.

The previous prime is 31303931. The next prime is 31303949. The reversal of 31303942 is 24930313.

It is a happy number.

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 (31303949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7825984 + ... + 7825987.

It is an arithmetic number, because the mean of its divisors is an integer number (11738979).

Almost surely, 2^31303942 is an apocalyptic number.

31303942 is a deficient number, since it is larger than the sum of its proper divisors (15651974).

31303942 is a wasteful number, since it uses less digits than its factorization.

31303942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15651973.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 31303942 is about 5594.9925826582. The cubic root of 31303942 is about 315.1613920585.

The spelling of 31303942 in words is "thirty-one million, three hundred three thousand, nine hundred forty-two".