252135722 has 8 divisors (see below), whose sum is σ = 383384676. Its totient is φ = 124340832.

The previous prime is 252135713. The next prime is 252135731. The reversal of 252135722 is 227531252.

It is an interprime number because it is at equal distance from previous prime (252135713) and next prime (252135731).

It can be written as a sum of positive squares in 2 ways, for example, as 211673401 + 40462321 = 14549^2 + 6361^2 .

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

It is a super-2 number, since 2×252135722² = 127144844616922568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863333 + ... + 863624.

Almost surely, 2^252135722 is an apocalyptic number.

252135722 is a deficient number, since it is larger than the sum of its proper divisors (131248954).

252135722 is a wasteful number, since it uses less digits than its factorization.

252135722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727032.

The product of its digits is 8400, while the sum is 29.

The square root of 252135722 is about 15878.7821321410. The cubic root of 252135722 is about 631.7493347790.

Adding to 252135722 its reverse (227531252), we get a palindrome (479666974).

The spelling of 252135722 in words is "two hundred fifty-two million, one hundred thirty-five thousand, seven hundred twenty-two".