3103991257 has 8 divisors (see below), whose sum is σ = 3287082600. Its totient is φ = 2920955904.

The previous prime is 3103991213. The next prime is 3103991273. The reversal of 3103991257 is 7521993013.

It can be written as a sum of positive squares in 4 ways, for example, as 452668176 + 2651323081 = 21276^2 + 51491^2 .

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 3103991257 - 2¹⁵ = 3103958489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3103991557) 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, 167469 + ... + 185077.

It is an arithmetic number, because the mean of its divisors is an integer number (410885325).

Almost surely, 2^3103991257 is an apocalyptic number.

It is an amenable number.

3103991257 is a deficient number, since it is larger than the sum of its proper divisors (183091343).

3103991257 is a wasteful number, since it uses less digits than its factorization.

3103991257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27995.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 3103991257 is about 55713.4746448290. The cubic root of 3103991257 is about 1458.7252363598.

The spelling of 3103991257 in words is "three billion, one hundred three million, nine hundred ninety-one thousand, two hundred fifty-seven".