52021630 has 32 divisors (see below), whose sum is σ = 100367424. Its totient is φ = 19362816.

The previous prime is 52021609. The next prime is 52021631. The reversal of 52021630 is 3612025.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 52021598 and 52021607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52021631) 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, 5454 + ... + 11566.

It is an arithmetic number, because the mean of its divisors is an integer number (3136482).

Almost surely, 2^52021630 is an apocalyptic number.

52021630 is a deficient number, since it is larger than the sum of its proper divisors (48345794).

52021630 is a wasteful number, since it uses less digits than its factorization.

52021630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 52021630 is about 7212.6021656542. The cubic root of 52021630 is about 373.3028612104.

Adding to 52021630 its reverse (3612025), we get a palindrome (55633655).

The spelling of 52021630 in words is "fifty-two million, twenty-one thousand, six hundred thirty".