252100422 has 48 divisors (see below), whose sum is σ = 645783840. Its totient is φ = 69543936.

The previous prime is 252100403. The next prime is 252100427. The reversal of 252100422 is 224001252.

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

It is a junction number, because it is equal to n+sod(n) for n = 252100395 and 252100404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252100427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30843 + ... + 38150.

It is an arithmetic number, because the mean of its divisors is an integer number (13453830).

Almost surely, 2^252100422 is an apocalyptic number.

252100422 is an abundant number, since it is smaller than the sum of its proper divisors (393683418).

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

252100422 is a wasteful number, since it uses less digits than its factorization.

252100422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69037 (or 69034 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 252100422 is about 15877.6705470292. The cubic root of 252100422 is about 631.7198509331.

Adding to 252100422 its reverse (224001252), we get a palindrome (476101674).

The spelling of 252100422 in words is "two hundred fifty-two million, one hundred thousand, four hundred twenty-two".