31442907 has 4 divisors (see below), whose sum is σ = 41923880. Its totient is φ = 20961936.

The previous prime is 31442893. The next prime is 31442921. The reversal of 31442907 is 70924413.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (31442893) and next prime (31442921).

It is not a de Polignac number, because 31442907 - 2¹² = 31438811 is a prime.

It is a super-2 number, since 2×31442907² = 1977312801221298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31482907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240482 + ... + 5240487.

It is an arithmetic number, because the mean of its divisors is an integer number (10480970).

Almost surely, 2^31442907 is an apocalyptic number.

31442907 is a deficient number, since it is larger than the sum of its proper divisors (10480973).

31442907 is a wasteful number, since it uses less digits than its factorization.

31442907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10480972.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 31442907 is about 5607.3975246990. The cubic root of 31442907 is about 315.6270603009.

The spelling of 31442907 in words is "thirty-one million, four hundred forty-two thousand, nine hundred seven".