51222729965 has 8 divisors (see below), whose sum is σ = 67055210208. Its totient is φ = 37252894480.

The previous prime is 51222729949. The next prime is 51222729977. The reversal of 51222729965 is 56992722215.

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

It is not a de Polignac number, because 51222729965 - 2⁴ = 51222729949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465661127 + ... + 465661236.

It is an arithmetic number, because the mean of its divisors is an integer number (8381901276).

Almost surely, 2^51222729965 is an apocalyptic number.

51222729965 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51222729965 is a deficient number, since it is larger than the sum of its proper divisors (15832480243).

51222729965 is a wasteful number, since it uses less digits than its factorization.

51222729965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931322379.

The product of its digits is 1360800, while the sum is 50.

It can be divided in two parts, 51222 and 729965, that added together give a palindrome (781187).

The spelling of 51222729965 in words is "fifty-one billion, two hundred twenty-two million, seven hundred twenty-nine thousand, nine hundred sixty-five".