51532361 has 4 divisors (see below), whose sum is σ = 52730832. Its totient is φ = 50333892.

The previous prime is 51532357. The next prime is 51532417. The reversal of 51532361 is 16323515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51532361 - 2² = 51532357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51532361.

It is not an unprimeable number, because it can be changed into a prime (51532301) 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, 599171 + ... + 599256.

It is an arithmetic number, because the mean of its divisors is an integer number (13182708).

Almost surely, 2^51532361 is an apocalyptic number.

It is an amenable number.

51532361 is a deficient number, since it is larger than the sum of its proper divisors (1198471).

51532361 is a wasteful number, since it uses less digits than its factorization.

51532361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198470.

The product of its digits is 2700, while the sum is 26.

The square root of 51532361 is about 7178.6043908270. The cubic root of 51532361 is about 372.1288551379.

Adding to 51532361 its reverse (16323515), we get a palindrome (67855876).

The spelling of 51532361 in words is "fifty-one million, five hundred thirty-two thousand, three hundred sixty-one".