51523135 has 4 divisors (see below), whose sum is σ = 61827768. Its totient is φ = 41218504.

The previous prime is 51523133. The next prime is 51523187. The reversal of 51523135 is 53132515.

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 51523135 - 2¹ = 51523133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51523133) 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, 5152309 + ... + 5152318.

It is an arithmetic number, because the mean of its divisors is an integer number (15456942).

Almost surely, 2^51523135 is an apocalyptic number.

51523135 is a deficient number, since it is larger than the sum of its proper divisors (10304633).

51523135 is a wasteful number, since it uses less digits than its factorization.

51523135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10304632.

The product of its digits is 2250, while the sum is 25.

The square root of 51523135 is about 7177.9617580480. The cubic root of 51523135 is about 372.1066460142.

The spelling of 51523135 in words is "fifty-one million, five hundred twenty-three thousand, one hundred thirty-five".