252221347 has 8 divisors (see below), whose sum is σ = 289176416. Its totient is φ = 215497152.

The previous prime is 252221339. The next prime is 252221357. The reversal of 252221347 is 743122252.

252221347 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 252221347 - 2³ = 252221339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252221357) 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, 55368 + ... + 59749.

It is an arithmetic number, because the mean of its divisors is an integer number (36147052).

Almost surely, 2^252221347 is an apocalyptic number.

252221347 is a deficient number, since it is larger than the sum of its proper divisors (36955069).

252221347 is a wasteful number, since it uses less digits than its factorization.

252221347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115437.

The product of its digits is 6720, while the sum is 28.

The square root of 252221347 is about 15881.4781113094. The cubic root of 252221347 is about 631.8208404667.

Adding to 252221347 its reverse (743122252), we get a palindrome (995343599).

It can be divided in two parts, 25222 and 1347, that added together give a square (26569 = 163²).

The spelling of 252221347 in words is "two hundred fifty-two million, two hundred twenty-one thousand, three hundred forty-seven".