52521729 has 8 divisors (see below), whose sum is σ = 75415872. Its totient is φ = 32321040.

The previous prime is 52521727. The next prime is 52521731. The reversal of 52521729 is 92712525.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (52521727) and next prime (52521731).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52521729 - 2¹ = 52521727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52521729.

It is not an unprimeable number, because it can be changed into a prime (52521727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 673317 + ... + 673394.

It is an arithmetic number, because the mean of its divisors is an integer number (9426984).

Almost surely, 2^52521729 is an apocalyptic number.

It is an amenable number.

52521729 is a deficient number, since it is larger than the sum of its proper divisors (22894143).

52521729 is a wasteful number, since it uses less digits than its factorization.

52521729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346727.

The product of its digits is 12600, while the sum is 33.

The square root of 52521729 is about 7247.1876614312. The cubic root of 52521729 is about 374.4952711905.

The spelling of 52521729 in words is "fifty-two million, five hundred twenty-one thousand, seven hundred twenty-nine".