3145516691 has 4 divisors (see below), whose sum is σ = 3176055792. Its totient is φ = 3114977592.

The previous prime is 3145516687. The next prime is 3145516723. The reversal of 3145516691 is 1966155413.

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

It is a cyclic number.

It is not a de Polignac number, because 3145516691 - 2² = 3145516687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3145516601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15269396 + ... + 15269601.

It is an arithmetic number, because the mean of its divisors is an integer number (794013948).

Almost surely, 2^3145516691 is an apocalyptic number.

3145516691 is a deficient number, since it is larger than the sum of its proper divisors (30539101).

3145516691 is a wasteful number, since it uses less digits than its factorization.

3145516691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30539100.

The product of its digits is 97200, while the sum is 41.

The square root of 3145516691 is about 56084.9060888935. The cubic root of 3145516691 is about 1465.2014215167.

The spelling of 3145516691 in words is "three billion, one hundred forty-five million, five hundred sixteen thousand, six hundred ninety-one".