52720019 has 4 divisors (see below), whose sum is σ = 57512760. Its totient is φ = 47927280.

The previous prime is 52720013. The next prime is 52720027. The reversal of 52720019 is 91002725.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52720019 is a prime.

It is a super-2 number, since 2×52720019² = 5558800806720722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52720019.

It is not an unprimeable number, because it can be changed into a prime (52720013) 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, 2396354 + ... + 2396375.

It is an arithmetic number, because the mean of its divisors is an integer number (14378190).

Almost surely, 2^52720019 is an apocalyptic number.

52720019 is a deficient number, since it is larger than the sum of its proper divisors (4792741).

52720019 is a wasteful number, since it uses less digits than its factorization.

52720019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792740.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 52720019 is about 7260.8552526545. The cubic root of 52720019 is about 374.9659678746.

The spelling of 52720019 in words is "fifty-two million, seven hundred twenty thousand, nineteen".