252138611 has 8 divisors (see below), whose sum is σ = 268448544. Its totient is φ = 235992960.

The previous prime is 252138589. The next prime is 252138613. The reversal of 252138611 is 116831252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252138611 is a prime.

It is a super-3 number, since 3×252138611³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252138613) 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, 37895 + ... + 44048.

It is an arithmetic number, because the mean of its divisors is an integer number (33556068).

Almost surely, 2^252138611 is an apocalyptic number.

252138611 is a deficient number, since it is larger than the sum of its proper divisors (16309933).

252138611 is a wasteful number, since it uses less digits than its factorization.

252138611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82141.

The product of its digits is 2880, while the sum is 29.

The square root of 252138611 is about 15878.8731023332. The cubic root of 252138611 is about 631.7517476552.

Adding to 252138611 its reverse (116831252), we get a palindrome (368969863).

The spelling of 252138611 in words is "two hundred fifty-two million, one hundred thirty-eight thousand, six hundred eleven".