31540093 has 8 divisors (see below), whose sum is σ = 34024536. Its totient is φ = 29064000.

The previous prime is 31540063. The next prime is 31540099. The reversal of 31540093 is 39004513.

It can be written as a sum of positive squares in 4 ways, for example, as 1750329 + 29789764 = 1323^2 + 5458^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31540093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31540099) 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, 7383 + ... + 10843.

It is an arithmetic number, because the mean of its divisors is an integer number (4253067).

Almost surely, 2^31540093 is an apocalyptic number.

It is an amenable number.

31540093 is a deficient number, since it is larger than the sum of its proper divisors (2484443).

31540093 is a wasteful number, since it uses less digits than its factorization.

31540093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4175.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 31540093 is about 5616.0567126766. The cubic root of 31540093 is about 315.9519134488.

The spelling of 31540093 in words is "thirty-one million, five hundred forty thousand, ninety-three".