31442170 has 8 divisors (see below), whose sum is σ = 56595924. Its totient is φ = 12576864.

The previous prime is 31442161. The next prime is 31442189. The reversal of 31442170 is 7124413.

It can be written as a sum of positive squares in 2 ways, for example, as 31438449 + 3721 = 5607^2 + 61^2 .

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

It is a super-2 number, since 2×31442170² = 1977220108617800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572099 + ... + 1572118.

Almost surely, 2^31442170 is an apocalyptic number.

31442170 is a deficient number, since it is larger than the sum of its proper divisors (25153754).

31442170 is a wasteful number, since it uses less digits than its factorization.

31442170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144224.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 31442170 is about 5607.3318075534. The cubic root of 31442170 is about 315.6245942549.

Adding to 31442170 its reverse (7124413), we get a palindrome (38566583).

The spelling of 31442170 in words is "thirty-one million, four hundred forty-two thousand, one hundred seventy".