51521363 has 4 divisors (see below), whose sum is σ = 52247088. Its totient is φ = 50795640.

The previous prime is 51521359. The next prime is 51521377. The reversal of 51521363 is 36312515.

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 51521363 - 2² = 51521359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51521263) 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, 362756 + ... + 362897.

It is an arithmetic number, because the mean of its divisors is an integer number (13061772).

Almost surely, 2^51521363 is an apocalyptic number.

51521363 is a deficient number, since it is larger than the sum of its proper divisors (725725).

51521363 is an equidigital number, since it uses as much as digits as its factorization.

51521363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725724.

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

The square root of 51521363 is about 7177.8383236181. The cubic root of 51521363 is about 372.1023800954.

Adding to 51521363 its reverse (36312515), we get a palindrome (87833878).

The spelling of 51521363 in words is "fifty-one million, five hundred twenty-one thousand, three hundred sixty-three".