52120530 has 256 divisors, whose sum is σ = 182476800. Its totient is φ = 10264320.

The previous prime is 52120483. The next prime is 52120547. The reversal of 52120530 is 3502125.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 478116 + ... + 478224.

It is an arithmetic number, because the mean of its divisors is an integer number (712800).

Almost surely, 2^52120530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52120530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91238400).

52120530 is an abundant number, since it is smaller than the sum of its proper divisors (130356270).

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

52120530 is a wasteful number, since it uses less digits than its factorization.

52120530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 52120530 is about 7219.4549655774. The cubic root of 52120530 is about 373.5392774939.

Adding to 52120530 its reverse (3502125), we get a palindrome (55622655).

It can be divided in two parts, 52120 and 530, that added together give a triangular number (52650 = T₃₂₄).

The spelling of 52120530 in words is "fifty-two million, one hundred twenty thousand, five hundred thirty".