51197922000 has 120 divisors (see below), whose sum is σ = 178817338440. Its totient is φ = 13652774400.

The previous prime is 51197921993. The next prime is 51197922047. The reversal of 51197922000 is 22979115.

51197922000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1159811136 + 50038110864 = 34056^2 + 223692^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1404165 + ... + 1440164.

It is an arithmetic number, because the mean of its divisors is an integer number (1490144487).

Almost surely, 2^51197922000 is an apocalyptic number.

51197922000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51197922000 is an abundant number, since it is smaller than the sum of its proper divisors (127619416440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51197922000 is a wasteful number, since it uses less digits than its factorization.

51197922000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844358 (or 2844339 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The spelling of 51197922000 in words is "fifty-one billion, one hundred ninety-seven million, nine hundred twenty-two thousand".