51756151 has 4 divisors (see below), whose sum is σ = 51792400. Its totient is φ = 51719904.

The previous prime is 51756113. The next prime is 51756163. The reversal of 51756151 is 15165715.

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 51756151 - 2¹⁵ = 51723383 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 (51756181) 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, 15891 + ... + 18868.

It is an arithmetic number, because the mean of its divisors is an integer number (12948100).

Almost surely, 2^51756151 is an apocalyptic number.

51756151 is a deficient number, since it is larger than the sum of its proper divisors (36249).

51756151 is a wasteful number, since it uses less digits than its factorization.

51756151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36248.

The product of its digits is 5250, while the sum is 31.

The square root of 51756151 is about 7194.1747963196. The cubic root of 51756151 is about 372.6667595612. Note that the first 3 decimals are identical.

The spelling of 51756151 in words is "fifty-one million, seven hundred fifty-six thousand, one hundred fifty-one".