31054409 has 4 divisors (see below), whose sum is σ = 31084740. Its totient is φ = 31024080.

The previous prime is 31054403. The next prime is 31054423. The reversal of 31054409 is 90445013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19998784 + 11055625 = 4472^2 + 3325^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31054409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31054403) 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, 13574 + ... + 15695.

It is an arithmetic number, because the mean of its divisors is an integer number (7771185).

Almost surely, 2^31054409 is an apocalyptic number.

It is an amenable number.

31054409 is a deficient number, since it is larger than the sum of its proper divisors (30331).

31054409 is a wasteful number, since it uses less digits than its factorization.

31054409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30330.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 31054409 is about 5572.6482932265. The cubic root of 31054409 is about 314.3217421016.

The spelling of 31054409 in words is "thirty-one million, fifty-four thousand, four hundred nine".