52779725 has 6 divisors (see below), whose sum is σ = 65446890. Its totient is φ = 42223760.

The previous prime is 52779721. The next prime is 52779743. The reversal of 52779725 is 52797725.

It can be written as a sum of positive squares in 3 ways, for example, as 521284 + 52258441 = 722^2 + 7229^2 .

It is not a de Polignac number, because 52779725 - 2² = 52779721 is a prime.

It is a super-3 number, since 3×52779725³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52779721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1055570 + ... + 1055619.

It is an arithmetic number, because the mean of its divisors is an integer number (10907815).

Almost surely, 2^52779725 is an apocalyptic number.

It is an amenable number.

52779725 is a deficient number, since it is larger than the sum of its proper divisors (12667165).

52779725 is a wasteful number, since it uses less digits than its factorization.

52779725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111199 (or 2111194 counting only the distinct ones).

The product of its digits is 308700, while the sum is 44.

The square root of 52779725 is about 7264.9655883562. The cubic root of 52779725 is about 375.1074654965.

The spelling of 52779725 in words is "fifty-two million, seven hundred seventy-nine thousand, seven hundred twenty-five".