52071720 has 32 divisors (see below), whose sum is σ = 156215520. Its totient is φ = 13885760.

The previous prime is 52071713. The next prime is 52071727. The reversal of 52071720 is 2717025.

It is an interprime number because it is at equal distance from previous prime (52071713) and next prime (52071727).

It is a super-2 number, since 2×52071720² = 5422928047516800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (52071727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216846 + ... + 217085.

It is an arithmetic number, because the mean of its divisors is an integer number (4881735).

Almost surely, 2^52071720 is an apocalyptic number.

It is an amenable number.

52071720 is an abundant number, since it is smaller than the sum of its proper divisors (104143800).

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

52071720 is a wasteful number, since it uses less digits than its factorization.

52071720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433945 (or 433941 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 52071720 is about 7216.0737246788. The cubic root of 52071720 is about 373.4226366580.

Adding to 52071720 its reverse (2717025), we get a palindrome (54788745).

The spelling of 52071720 in words is "fifty-two million, seventy-one thousand, seven hundred twenty".