52145111 has 4 divisors (see below), whose sum is σ = 53357832. Its totient is φ = 50932392.

The previous prime is 52145053. The next prime is 52145129. The reversal of 52145111 is 11154125.

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 52145111 - 2¹⁸ = 51882967 is a prime.

It is a super-2 number, since 2×52145111² = 5438225202404642, 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 (52115111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 606296 + ... + 606381.

It is an arithmetic number, because the mean of its divisors is an integer number (13339458).

Almost surely, 2^52145111 is an apocalyptic number.

52145111 is a deficient number, since it is larger than the sum of its proper divisors (1212721).

52145111 is a wasteful number, since it uses less digits than its factorization.

52145111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212720.

The product of its digits is 200, while the sum is 20.

The square root of 52145111 is about 7221.1571787353. The cubic root of 52145111 is about 373.5979909279.

Adding to 52145111 its reverse (11154125), we get a palindrome (63299236).

The spelling of 52145111 in words is "fifty-two million, one hundred forty-five thousand, one hundred eleven".