31356149 has 8 divisors (see below), whose sum is σ = 34458048. Its totient is φ = 28296160.

The previous prime is 31356133. The next prime is 31356151. The reversal of 31356149 is 94165313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31356149 - 2⁴ = 31356133 is a prime.

It is a super-2 number, since 2×31356149² = 1966416160220402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31356119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8897 + ... + 11910.

It is an arithmetic number, because the mean of its divisors is an integer number (4307256).

Almost surely, 2^31356149 is an apocalyptic number.

It is an amenable number.

31356149 is a deficient number, since it is larger than the sum of its proper divisors (3101899).

31356149 is a wasteful number, since it uses less digits than its factorization.

31356149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20955.

The product of its digits is 9720, while the sum is 32.

The square root of 31356149 is about 5599.6561501578. The cubic root of 31356149 is about 315.3364977202.

The spelling of 31356149 in words is "thirty-one million, three hundred fifty-six thousand, one hundred forty-nine".