31143119 has 4 divisors (see below), whose sum is σ = 35592144. Its totient is φ = 26694096.

The previous prime is 31143113. The next prime is 31143157. The reversal of 31143119 is 91134113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91134113 = 7 ⋅13019159.

It is a cyclic number.

It is not a de Polignac number, because 31143119 - 2⁴ = 31143103 is a prime.

It is a super-2 number, since 2×31143119² = 1939787722096322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31143094 and 31143103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224502 + ... + 2224515.

It is an arithmetic number, because the mean of its divisors is an integer number (8898036).

Almost surely, 2^31143119 is an apocalyptic number.

31143119 is a deficient number, since it is larger than the sum of its proper divisors (4449025).

31143119 is an equidigital number, since it uses as much as digits as its factorization.

31143119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4449024.

The product of its digits is 324, while the sum is 23.

The square root of 31143119 is about 5580.6020284554. The cubic root of 31143119 is about 314.6207546418.

The spelling of 31143119 in words is "thirty-one million, one hundred forty-three thousand, one hundred nineteen".