51535023 has 4 divisors (see below), whose sum is σ = 68713368. Its totient is φ = 34356680.

The previous prime is 51535021. The next prime is 51535037. The reversal of 51535023 is 32053515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51535023 - 2¹ = 51535021 is a prime.

It is a super-2 number, since 2×51535023² = 5311717191221058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51534984 and 51535002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51535021) 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, 8589168 + ... + 8589173.

It is an arithmetic number, because the mean of its divisors is an integer number (17178342).

Almost surely, 2^51535023 is an apocalyptic number.

51535023 is a deficient number, since it is larger than the sum of its proper divisors (17178345).

51535023 is a wasteful number, since it uses less digits than its factorization.

51535023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17178344.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 51535023 is about 7178.7898005165. The cubic root of 51535023 is about 372.1352626970.

Adding to 51535023 its reverse (32053515), we get a palindrome (83588538).

The spelling of 51535023 in words is "fifty-one million, five hundred thirty-five thousand, twenty-three".