56752021 has 8 divisors (see below), whose sum is σ = 57996288. Its totient is φ = 55518000.

The previous prime is 56752019. The next prime is 56752027. The reversal of 56752021 is 12025765.

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

It is a cyclic number.

It is not a de Polignac number, because 56752021 - 2¹ = 56752019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56752027) 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, 9216 + ... + 14086.

It is an arithmetic number, because the mean of its divisors is an integer number (7249536).

Almost surely, 2^56752021 is an apocalyptic number.

It is an amenable number.

56752021 is a deficient number, since it is larger than the sum of its proper divisors (1244267).

56752021 is a wasteful number, since it uses less digits than its factorization.

56752021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 56752021 is about 7533.3937239467. The cubic root of 56752021 is about 384.2912038982.

Adding to 56752021 its reverse (12025765), we get a palindrome (68777786).

The spelling of 56752021 in words is "fifty-six million, seven hundred fifty-two thousand, twenty-one".