31442198 has 4 divisors (see below), whose sum is σ = 47163300. Its totient is φ = 15721098.

The previous prime is 31442189. The next prime is 31442239. The reversal of 31442198 is 89124413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89124413 = 7 ⋅12732059.

It is a super-2 number, since 2×31442198² = 1977223630142408, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7860548 + ... + 7860551.

It is an arithmetic number, because the mean of its divisors is an integer number (11790825).

Almost surely, 2^31442198 is an apocalyptic number.

31442198 is a deficient number, since it is larger than the sum of its proper divisors (15721102).

31442198 is a wasteful number, since it uses less digits than its factorization.

31442198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15721101.

The product of its digits is 6912, while the sum is 32.

The square root of 31442198 is about 5607.3343042840. The cubic root of 31442198 is about 315.6246879453.

The spelling of 31442198 in words is "thirty-one million, four hundred forty-two thousand, one hundred ninety-eight".