5123351538 has 18 divisors (see below), whose sum is σ = 11101253007. Its totient is φ = 1707682620.

The previous prime is 5123351507. The next prime is 5123351543. The reversal of 5123351538 is 8351533215.

5123351538 is a `hidden beast` number, since 51 + 23 + 3 + 51 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2561675769 + 2561675769 = 50613^2 + 50613^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=50613.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 295243 + ... + 312113.

Almost surely, 2^5123351538 is an apocalyptic number.

5123351538 is an abundant number, since it is smaller than the sum of its proper divisors (5977901469).

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

5123351538 is an frugal number, since it uses more digits than its factorization.

5123351538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33750 (or 16876 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 5123351538 is about 71577.5910323895. The cubic root of 5123351538 is about 1723.9237465443.

The spelling of 5123351538 in words is "five billion, one hundred twenty-three million, three hundred fifty-one thousand, five hundred thirty-eight".