252405511 has 4 divisors (see below), whose sum is σ = 267252912. Its totient is φ = 237558112.

The previous prime is 252405509. The next prime is 252405533. The reversal of 252405511 is 115504252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252405511 - 2¹ = 252405509 is a prime.

It is a super-2 number, since 2×252405511² = 127417083966342242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252405581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7423675 + ... + 7423708.

It is an arithmetic number, because the mean of its divisors is an integer number (66813228).

Almost surely, 2^252405511 is an apocalyptic number.

252405511 is a deficient number, since it is larger than the sum of its proper divisors (14847401).

252405511 is a wasteful number, since it uses less digits than its factorization.

252405511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14847400.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 252405511 is about 15887.2751282276. The cubic root of 252405511 is about 631.9745815433.

Adding to 252405511 its reverse (115504252), we get a palindrome (367909763).

The spelling of 252405511 in words is "two hundred fifty-two million, four hundred five thousand, five hundred eleven".