51945117 has 16 divisors (see below), whose sum is σ = 80046720. Its totient is φ = 29348352.

The previous prime is 51945079. The next prime is 51945133. The reversal of 51945117 is 71154915.

It is not a de Polignac number, because 51945117 - 2⁶ = 51945053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51945137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12028 + ... + 15765.

It is an arithmetic number, because the mean of its divisors is an integer number (5002920).

Almost surely, 2^51945117 is an apocalyptic number.

It is an amenable number.

51945117 is a deficient number, since it is larger than the sum of its proper divisors (28101603).

51945117 is a wasteful number, since it uses less digits than its factorization.

51945117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27892.

The product of its digits is 6300, while the sum is 33.

The square root of 51945117 is about 7207.2960949305. The cubic root of 51945117 is about 373.1197544499.

The spelling of 51945117 in words is "fifty-one million, nine hundred forty-five thousand, one hundred seventeen".