51895950 has 48 divisors (see below), whose sum is σ = 129270000. Its totient is φ = 13777920.

The previous prime is 51895939. The next prime is 51895979. The reversal of 51895950 is 5959815.

It is a happy number.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 40926 + ... + 42174.

It is an arithmetic number, because the mean of its divisors is an integer number (2693125).

Almost surely, 2^51895950 is an apocalyptic number.

51895950 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 51895950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64635000).

51895950 is an abundant number, since it is smaller than the sum of its proper divisors (77374050).

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

51895950 is a wasteful number, since it uses less digits than its factorization.

51895950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541 (or 1536 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 51895950 is about 7203.8843688666. The cubic root of 51895950 is about 373.0019957391.

The spelling of 51895950 in words is "fifty-one million, eight hundred ninety-five thousand, nine hundred fifty".