51250305450 has 192 divisors, whose sum is σ = 143860292352. Its totient is φ = 12002918400.

The previous prime is 51250305439. The next prime is 51250305487. The reversal of 51250305450 is 5450305215.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2393994 + ... + 2415306.

It is an arithmetic number, because the mean of its divisors is an integer number (749272356).

Almost surely, 2^51250305450 is an apocalyptic number.

51250305450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51250305450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71930146176).

51250305450 is an abundant number, since it is smaller than the sum of its proper divisors (92609986902).

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

51250305450 is a wasteful number, since it uses less digits than its factorization.

51250305450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21409 (or 21404 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 51250305450 in words is "fifty-one billion, two hundred fifty million, three hundred five thousand, four hundred fifty".