51024381 has 4 divisors (see below), whose sum is σ = 68032512. Its totient is φ = 34016252.

The previous prime is 51024371. The next prime is 51024383. The reversal of 51024381 is 18342015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51024381 - 2¹⁷ = 50893309 is a prime.

It is a super-2 number, since 2×51024381² = 5206974912866322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51024383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8504061 + ... + 8504066.

It is an arithmetic number, because the mean of its divisors is an integer number (17008128).

Almost surely, 2^51024381 is an apocalyptic number.

It is an amenable number.

51024381 is a deficient number, since it is larger than the sum of its proper divisors (17008131).

51024381 is a wasteful number, since it uses less digits than its factorization.

51024381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17008130.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51024381 is about 7143.1352360151. The cubic root of 51024381 is about 370.9020624313.

Adding to 51024381 its reverse (18342015), we get a palindrome (69366396).

The spelling of 51024381 in words is "fifty-one million, twenty-four thousand, three hundred eighty-one".