51023520000 has 900 divisors, whose sum is σ = 197795885056. Its totient is φ = 13063680000.

The previous prime is 51023519927. The next prime is 51023520001. The reversal of 51023520000 is 2532015.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (900).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (51023520001) by changing a digit.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 401759937 + ... + 401760063.

Almost surely, 2^51023520000 is an apocalyptic number.

51023520000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51023520000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98897942528).

51023520000 is an abundant number, since it is smaller than the sum of its proper divisors (146772365056).

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

51023520000 is an equidigital number, since it uses as much as digits as its factorization.

51023520000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The spelling of 51023520000 in words is "fifty-one billion, twenty-three million, five hundred twenty thousand".