51533771 has 4 divisors (see below), whose sum is σ = 51651600. Its totient is φ = 51415944.

The previous prime is 51533743. The next prime is 51533789. The reversal of 51533771 is 17733515.

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 51533771 - 2⁶ = 51533707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51533371) 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, 58256 + ... + 59133.

It is an arithmetic number, because the mean of its divisors is an integer number (12912900).

Almost surely, 2^51533771 is an apocalyptic number.

51533771 is a deficient number, since it is larger than the sum of its proper divisors (117829).

51533771 is a wasteful number, since it uses less digits than its factorization.

51533771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117828.

The product of its digits is 11025, while the sum is 32.

The square root of 51533771 is about 7178.7025986595. The cubic root of 51533771 is about 372.1322491016.

The spelling of 51533771 in words is "fifty-one million, five hundred thirty-three thousand, seven hundred seventy-one".