51943290 has 128 divisors (see below), whose sum is σ = 150405120. Its totient is φ = 11232000.

The previous prime is 51943267. The next prime is 51943349. The reversal of 51943290 is 9234915.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 514240 + ... + 514340.

It is an arithmetic number, because the mean of its divisors is an integer number (1175040).

Almost surely, 2^51943290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51943290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75202560).

51943290 is an abundant number, since it is smaller than the sum of its proper divisors (98461830).

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

51943290 is a wasteful number, since it uses less digits than its factorization.

51943290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 51943290 is about 7207.1693472542. The cubic root of 51943290 is about 373.1153799753.

The spelling of 51943290 in words is "fifty-one million, nine hundred forty-three thousand, two hundred ninety".