31442245 has 24 divisors (see below), whose sum is σ = 40888800. Its totient is φ = 23145696.

The previous prime is 31442239. The next prime is 31442261. The reversal of 31442245 is 54224413.

It is a happy number.

It is not a de Polignac number, because 31442245 - 2⁹ = 31441733 is a prime.

It is a super-2 number, since 2×31442245² = 1977229541280050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 175566 + ... + 175744.

It is an arithmetic number, because the mean of its divisors is an integer number (1703700).

Almost surely, 2^31442245 is an apocalyptic number.

It is an amenable number.

31442245 is a deficient number, since it is larger than the sum of its proper divisors (9446555).

31442245 is a wasteful number, since it uses less digits than its factorization.

31442245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 246 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 31442245 is about 5607.3384952221. The cubic root of 31442245 is about 315.6248452112.

Adding to 31442245 its reverse (54224413), we get a palindrome (85666658).

The spelling of 31442245 in words is "thirty-one million, four hundred forty-two thousand, two hundred forty-five".