52311440 has 20 divisors (see below), whose sum is σ = 121624284. Its totient is φ = 20924544.

The previous prime is 52311439. The next prime is 52311461. The reversal of 52311440 is 4411325.

It can be written as a sum of positive squares in 2 ways, for example, as 29767936 + 22543504 = 5456^2 + 4748^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 326867 + ... + 327026.

Almost surely, 2^52311440 is an apocalyptic number.

It is an amenable number.

52311440 is an abundant number, since it is smaller than the sum of its proper divisors (69312844).

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

52311440 is a wasteful number, since it uses less digits than its factorization.

52311440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653906 (or 653900 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 52311440 is about 7232.6647924537. The cubic root of 52311440 is about 373.9947953178.

Adding to 52311440 its reverse (4411325), we get a palindrome (56722765).

The spelling of 52311440 in words is "fifty-two million, three hundred eleven thousand, four hundred forty".