51943830 has 32 divisors (see below), whose sum is σ = 125065728. Its totient is φ = 13807200.

The previous prime is 51943811. The next prime is 51943861. The reversal of 51943830 is 3834915.

It is a super-2 number, since 2×51943830² = 5396322950137800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51943791 and 51943800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7315 + ... + 12545.

It is an arithmetic number, because the mean of its divisors is an integer number (3908304).

Almost surely, 2^51943830 is an apocalyptic number.

51943830 is an abundant number, since it is smaller than the sum of its proper divisors (73121898).

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

51943830 is a wasteful number, since it uses less digits than its factorization.

51943830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5572.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 51943830 is about 7207.2068098536. The cubic root of 51943830 is about 373.1166729341.

The spelling of 51943830 in words is "fifty-one million, nine hundred forty-three thousand, eight hundred thirty".