51226320737 has 16 divisors (see below), whose sum is σ = 54370748880. Its totient is φ = 48177561600.

The previous prime is 51226320701. The next prime is 51226320763. The reversal of 51226320737 is 73702362215.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5125696 + 51221195041 = 2264^2 + 226321^2 .

It is a cyclic number.

It is not a de Polignac number, because 51226320737 - 2³⁰ = 50152578913 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 51226320737.

It is not an unprimeable number, because it can be changed into a prime (51226320787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728543 + ... + 795755.

It is an arithmetic number, because the mean of its divisors is an integer number (3398171805).

Almost surely, 2^51226320737 is an apocalyptic number.

It is an amenable number.

51226320737 is a deficient number, since it is larger than the sum of its proper divisors (3144428143).

51226320737 is a wasteful number, since it uses less digits than its factorization.

51226320737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67924.

The product of its (nonzero) digits is 105840, while the sum is 38.

The spelling of 51226320737 in words is "fifty-one billion, two hundred twenty-six million, three hundred twenty thousand, seven hundred thirty-seven".