3121423520 has 24 divisors (see below), whose sum is σ = 7374363444. Its totient is φ = 1248569344.

The previous prime is 3121423477. The next prime is 3121423523. The reversal of 3121423520 is 253241213.

It can be written as a sum of positive squares in 2 ways, for example, as 3121233424 + 190096 = 55868^2 + 436^2 .

It is not an unprimeable number, because it can be changed into a prime (3121423523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9754289 + ... + 9754608.

Almost surely, 2^3121423520 is an apocalyptic number.

It is an amenable number.

3121423520 is an abundant number, since it is smaller than the sum of its proper divisors (4252939924).

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

3121423520 is a wasteful number, since it uses less digits than its factorization.

3121423520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19508912 (or 19508904 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 3121423520 is about 55869.7012700086. The cubic root of 3121423520 is about 1461.4509126789.

Adding to 3121423520 its reverse (253241213), we get a palindrome (3374664733).

The spelling of 3121423520 in words is "three billion, one hundred twenty-one million, four hundred twenty-three thousand, five hundred twenty".