52116540 has 48 divisors (see below), whose sum is σ = 166774272. Its totient is φ = 11912256.

The previous prime is 52116527. The next prime is 52116541. The reversal of 52116540 is 4561125.

It is a super-2 number, since 2×52116540² = 5432267483143200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52116540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52116541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61624 + ... + 62463.

It is an arithmetic number, because the mean of its divisors is an integer number (3474464).

Almost surely, 2^52116540 is an apocalyptic number.

It is an amenable number.

52116540 is an abundant number, since it is smaller than the sum of its proper divisors (114657732).

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

52116540 is a wasteful number, since it uses less digits than its factorization.

52116540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124106 (or 124104 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 52116540 is about 7219.1786236386. The cubic root of 52116540 is about 373.5297453591.

Adding to 52116540 its reverse (4561125), we get a palindrome (56677665).

The spelling of 52116540 in words is "fifty-two million, one hundred sixteen thousand, five hundred forty".