51227190 has 192 divisors, whose sum is σ = 163418112. Its totient is φ = 10886400.

The previous prime is 51227179. The next prime is 51227207. The reversal of 51227190 is 9172215.

51227190 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51227190² = 5248449990592200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 839760 + ... + 839820.

It is an arithmetic number, because the mean of its divisors is an integer number (851136).

Almost surely, 2^51227190 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51227190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81709056).

51227190 is an abundant number, since it is smaller than the sum of its proper divisors (112190922).

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

51227190 is a wasteful number, since it uses less digits than its factorization.

51227190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 51227190 is about 7157.3172348304. The cubic root of 51227190 is about 371.3928267236.

The spelling of 51227190 in words is "fifty-one million, two hundred twenty-seven thousand, one hundred ninety".