252620531306 has 24 divisors (see below), whose sum is σ = 448550001732. Its totient is φ = 105994627200.

The previous prime is 252620531209. The next prime is 252620531321. The reversal of 252620531306 is 603135026252.

It can be written as a sum of positive squares in 2 ways, for example, as 178709953081 + 73910578225 = 422741^2 + 271865^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40146335 + ... + 40152626.

Almost surely, 2^252620531306 is an apocalyptic number.

252620531306 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

252620531306 is a deficient number, since it is larger than the sum of its proper divisors (195929470426).

252620531306 is a wasteful number, since it uses less digits than its factorization.

252620531306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80298998 (or 80298987 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 252620531306 its reverse (603135026252), we get a palindrome (855755557558).

The spelling of 252620531306 in words is "two hundred fifty-two billion, six hundred twenty million, five hundred thirty-one thousand, three hundred six".