5219510981 has 4 divisors (see below), whose sum is σ = 5219679264. Its totient is φ = 5219342700.

The previous prime is 5219510977. The next prime is 5219510987. The reversal of 5219510981 is 1890159125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5219510981 - 2² = 5219510977 is a prime.

It is a super-4 number, since 4×5219510981⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5219510987) 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, 22625 + ... + 104646.

It is an arithmetic number, because the mean of its divisors is an integer number (1304919816).

Almost surely, 2^5219510981 is an apocalyptic number.

It is an amenable number.

5219510981 is a deficient number, since it is larger than the sum of its proper divisors (168283).

5219510981 is a wasteful number, since it uses less digits than its factorization.

5219510981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168282.

The product of its (nonzero) digits is 32400, while the sum is 41.

The square root of 5219510981 is about 72246.1831586970. The cubic root of 5219510981 is about 1734.6423235425.

The spelling of 5219510981 in words is "five billion, two hundred nineteen million, five hundred ten thousand, nine hundred eighty-one".