51305722 has 8 divisors (see below), whose sum is σ = 82878516. Its totient is φ = 23679552.

The previous prime is 51305707. The next prime is 51305731. The reversal of 51305722 is 22750315.

It can be written as a sum of positive squares in 2 ways, for example, as 51136801 + 168921 = 7151^2 + 411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 986623 + ... + 986674.

Almost surely, 2^51305722 is an apocalyptic number.

51305722 is a deficient number, since it is larger than the sum of its proper divisors (31572794).

51305722 is a wasteful number, since it uses less digits than its factorization.

51305722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973312.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 51305722 is about 7162.8012676606. The cubic root of 51305722 is about 371.5825132948.

The spelling of 51305722 in words is "fifty-one million, three hundred five thousand, seven hundred twenty-two".