3121030625 has 20 divisors (see below), whose sum is σ = 3904750080. Its totient is φ = 2493810000.

The previous prime is 3121030621. The next prime is 3121030631. The reversal of 3121030625 is 5260301213.

It is not a de Polignac number, because 3121030625 - 2² = 3121030621 is a prime.

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 3121030625.

It is not an unprimeable number, because it can be changed into a prime (3121030621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 616856 + ... + 621894.

It is an arithmetic number, because the mean of its divisors is an integer number (195237504).

Almost surely, 2^3121030625 is an apocalyptic number.

It is an amenable number.

3121030625 is a deficient number, since it is larger than the sum of its proper divisors (783719455).

3121030625 is an frugal number, since it uses more digits than its factorization.

3121030625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6050 (or 6035 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 3121030625 is about 55866.1849869847. The cubic root of 3121030625 is about 1461.3895922754.

Adding to 3121030625 its reverse (5260301213), we get a palindrome (8381331838).

The spelling of 3121030625 in words is "three billion, one hundred twenty-one million, thirty thousand, six hundred twenty-five".