51321763 has 4 divisors (see below), whose sum is σ = 53553168. Its totient is φ = 49090360.

The previous prime is 51321733. The next prime is 51321773. The reversal of 51321763 is 36712315.

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 51321763 - 2¹³ = 51313571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51321713) 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, 1115668 + ... + 1115713.

It is an arithmetic number, because the mean of its divisors is an integer number (13388292).

Almost surely, 2^51321763 is an apocalyptic number.

51321763 is a deficient number, since it is larger than the sum of its proper divisors (2231405).

51321763 is a wasteful number, since it uses less digits than its factorization.

51321763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231404.

The product of its digits is 3780, while the sum is 28.

The square root of 51321763 is about 7163.9209236283. The cubic root of 51321763 is about 371.6212349927.

The spelling of 51321763 in words is "fifty-one million, three hundred twenty-one thousand, seven hundred sixty-three".