3121000520 has 64 divisors (see below), whose sum is σ = 7666747200. Its totient is φ = 1134004480.

The previous prime is 3121000507. The next prime is 3121000567. The reversal of 3121000520 is 250001213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3121000495 and 3121000504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823991 + ... + 827769.

It is an arithmetic number, because the mean of its divisors is an integer number (119792925).

Almost surely, 2^3121000520 is an apocalyptic number.

It is an amenable number.

3121000520 is an abundant number, since it is smaller than the sum of its proper divisors (4545746680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121000520 is a wasteful number, since it uses less digits than its factorization.

3121000520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5678 (or 5674 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 3121000520 is about 55865.9155478544. The cubic root of 3121000520 is about 1461.3848934776.

Adding to 3121000520 its reverse (250001213), we get a palindrome (3371001733).

The spelling of 3121000520 in words is "three billion, one hundred twenty-one million, five hundred twenty", and thus it is an aban number.