51721850337 has 8 divisors (see below), whose sum is σ = 69043317504. Its totient is φ = 34440808368.

The previous prime is 51721850321. The next prime is 51721850351. The reversal of 51721850337 is 73305812715.

It is a happy number.

51721850337 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51721850337 - 2⁴ = 51721850321 is a prime.

It is a super-3 number, since 3×51721850337³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51721854337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10103313 + ... + 10108430.

It is an arithmetic number, because the mean of its divisors is an integer number (8630414688).

Almost surely, 2^51721850337 is an apocalyptic number.

It is an amenable number.

51721850337 is a deficient number, since it is larger than the sum of its proper divisors (17321467167).

51721850337 is a wasteful number, since it uses less digits than its factorization.

51721850337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20212599.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 51721850337 in words is "fifty-one billion, seven hundred twenty-one million, eight hundred fifty thousand, three hundred thirty-seven".