3121302513 has 8 divisors (see below), whose sum is σ = 4756270528. Its totient is φ = 1783601424.

The previous prime is 3121302491. The next prime is 3121302529. The reversal of 3121302513 is 3152031213.

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

It is not a de Polignac number, because 3121302513 - 2¹⁰ = 3121301489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 148633453 = 3121302513 / (3 + 1 + 2 + 1 + 3 + 0 + 2 + 5 + 1 + 3).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121302513.

It is not an unprimeable number, because it can be changed into a prime (3121302113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74316706 + ... + 74316747.

It is an arithmetic number, because the mean of its divisors is an integer number (594533816).

Almost surely, 2^3121302513 is an apocalyptic number.

It is an amenable number.

3121302513 is a deficient number, since it is larger than the sum of its proper divisors (1634968015).

3121302513 is a wasteful number, since it uses less digits than its factorization.

3121302513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148633463.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 3121302513 is about 55868.6183201267. The cubic root of 3121302513 is about 1461.4320272703.

Adding to 3121302513 its reverse (3152031213), we get a palindrome (6273333726).

The spelling of 3121302513 in words is "three billion, one hundred twenty-one million, three hundred two thousand, five hundred thirteen".