51943923 has 24 divisors (see below), whose sum is σ = 78305136. Its totient is φ = 34408800.

The previous prime is 51943861. The next prime is 51943939. The reversal of 51943923 is 32934915.

It is a happy number.

It is not a de Polignac number, because 51943923 - 2¹⁰ = 51942899 is a prime.

It is a super-2 number, since 2×51943923² = 5396342273259858, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (51943963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43393 + ... + 44573.

It is an arithmetic number, because the mean of its divisors is an integer number (3262714).

Almost surely, 2^51943923 is an apocalyptic number.

51943923 is a deficient number, since it is larger than the sum of its proper divisors (26361213).

51943923 is a wasteful number, since it uses less digits than its factorization.

51943923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377 (or 1365 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 51943923 is about 7207.2132617261. The cubic root of 51943923 is about 373.1168956094.

The spelling of 51943923 in words is "fifty-one million, nine hundred forty-three thousand, nine hundred twenty-three".