52111640 has 32 divisors (see below), whose sum is σ = 134002080. Its totient is φ = 17866752.

The previous prime is 52111621. The next prime is 52111643. The reversal of 52111640 is 4611125.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52111643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92777 + ... + 93336.

It is an arithmetic number, because the mean of its divisors is an integer number (4187565).

Almost surely, 2^52111640 is an apocalyptic number.

It is an amenable number.

52111640 is an abundant number, since it is smaller than the sum of its proper divisors (81890440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52111640 is a wasteful number, since it uses less digits than its factorization.

52111640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186131 (or 186127 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 52111640 is about 7218.8392418726. The cubic root of 52111640 is about 373.5180385630.

Adding to 52111640 its reverse (4611125), we get a palindrome (56722765).

The spelling of 52111640 in words is "fifty-two million, one hundred eleven thousand, six hundred forty".