31061157 has 8 divisors (see below), whose sum is σ = 41589120. Its totient is φ = 20620320.

The previous prime is 31061123. The next prime is 31061171. The reversal of 31061157 is 75116013.

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

It is not a de Polignac number, because 31061157 - 2⁸ = 31060901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31061197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20944 + ... + 22377.

It is an arithmetic number, because the mean of its divisors is an integer number (5198640).

Almost surely, 2^31061157 is an apocalyptic number.

It is an amenable number.

31061157 is a deficient number, since it is larger than the sum of its proper divisors (10527963).

31061157 is a wasteful number, since it uses less digits than its factorization.

31061157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43563.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 31061157 is about 5573.2537175334. The cubic root of 31061157 is about 314.3445074090.

The spelling of 31061157 in words is "thirty-one million, sixty-one thousand, one hundred fifty-seven".