51309332356 has 12 divisors (see below), whose sum is σ = 91263321100. Its totient is φ = 25234097760.

The previous prime is 51309332339. The next prime is 51309332387. The reversal of 51309332356 is 65323390315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24455955456 + 26853376900 = 156384^2 + 163870^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105141831 + ... + 105142318.

Almost surely, 2^51309332356 is an apocalyptic number.

It is an amenable number.

51309332356 is a deficient number, since it is larger than the sum of its proper divisors (39953988744).

51309332356 is a wasteful number, since it uses less digits than its factorization.

51309332356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210284214 (or 210284212 counting only the distinct ones).

The product of its (nonzero) digits is 218700, while the sum is 40.

The spelling of 51309332356 in words is "fifty-one billion, three hundred nine million, three hundred thirty-two thousand, three hundred fifty-six".