31199419 has 4 divisors (see below), whose sum is σ = 31356400. Its totient is φ = 31042440.

The previous prime is 31199411. The next prime is 31199429. The reversal of 31199419 is 91499113.

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

It is a cyclic number.

It is not a de Polignac number, because 31199419 - 2³ = 31199411 is a prime.

It is a super-2 number, since 2×31199419² = 1946807491875122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31199411) 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 in 3 ways as a sum of consecutive naturals, for example, 78192 + ... + 78589.

It is an arithmetic number, because the mean of its divisors is an integer number (7839100).

Almost surely, 2^31199419 is an apocalyptic number.

31199419 is a deficient number, since it is larger than the sum of its proper divisors (156981).

31199419 is a wasteful number, since it uses less digits than its factorization.

31199419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156980.

The product of its digits is 8748, while the sum is 37.

The square root of 31199419 is about 5585.6440094227. The cubic root of 31199419 is about 314.8102291915.

The spelling of 31199419 in words is "thirty-one million, one hundred ninety-nine thousand, four hundred nineteen".