51749118 has 20 divisors (see below), whose sum is σ = 115956720. Its totient is φ = 17249652.

The previous prime is 51749101. The next prime is 51749119. The reversal of 51749118 is 81194715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51749119) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 159558 + ... + 159881.

It is an arithmetic number, because the mean of its divisors is an integer number (5797836).

Almost surely, 2^51749118 is an apocalyptic number.

51749118 is an abundant number, since it is smaller than the sum of its proper divisors (64207602).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51749118 is a wasteful number, since it uses less digits than its factorization.

51749118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319453 (or 319444 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 51749118 is about 7193.6859814701. The cubic root of 51749118 is about 372.6498785786.

The spelling of 51749118 in words is "fifty-one million, seven hundred forty-nine thousand, one hundred eighteen".