31138119 has 6 divisors (see below), whose sum is σ = 44977296. Its totient is φ = 20758740.

The previous prime is 31138117. The next prime is 31138153. The reversal of 31138119 is 91183113.

It is a happy number.

It is not a de Polignac number, because 31138119 - 2¹ = 31138117 is a prime.

It is a super-2 number, since 2×31138119² = 1939164909716322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31138092 and 31138101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31138117) 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 5 ways as a sum of consecutive naturals, for example, 1729887 + ... + 1729904.

It is an arithmetic number, because the mean of its divisors is an integer number (7496216).

Almost surely, 2^31138119 is an apocalyptic number.

31138119 is a deficient number, since it is larger than the sum of its proper divisors (13839177).

31138119 is a wasteful number, since it uses less digits than its factorization.

31138119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3459797 (or 3459794 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 31138119 is about 5580.1540301321. The cubic root of 31138119 is about 314.6039163800.

The spelling of 31138119 in words is "thirty-one million, one hundred thirty-eight thousand, one hundred nineteen".