31005049 has 4 divisors (see below), whose sum is σ = 31093236. Its totient is φ = 30916864.

The previous prime is 31005047. The next prime is 31005067. The reversal of 31005049 is 94050013.

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 16867449 + 14137600 = 4107^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 31005049 - 2¹ = 31005047 is a prime.

It is a super-2 number, since 2×31005049² = 1922626126984802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31005041) 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, 43564 + ... + 44269.

It is an arithmetic number, because the mean of its divisors is an integer number (7773309).

Almost surely, 2^31005049 is an apocalyptic number.

It is an amenable number.

31005049 is a deficient number, since it is larger than the sum of its proper divisors (88187).

31005049 is an equidigital number, since it uses as much as digits as its factorization.

31005049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88186.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 31005049 is about 5568.2177579545. The cubic root of 31005049 is about 314.1551189702.

The spelling of 31005049 in words is "thirty-one million, five thousand, forty-nine".