51948971 has 4 divisors (see below), whose sum is σ = 52084992. Its totient is φ = 51812952.

The previous prime is 51948937. The next prime is 51948979. The reversal of 51948971 is 17984915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51948971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51948979) 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, 67436 + ... + 68201.

It is an arithmetic number, because the mean of its divisors is an integer number (13021248).

Almost surely, 2^51948971 is an apocalyptic number.

51948971 is a deficient number, since it is larger than the sum of its proper divisors (136021).

51948971 is a wasteful number, since it uses less digits than its factorization.

51948971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136020.

The product of its digits is 90720, while the sum is 44.

The square root of 51948971 is about 7207.5634579239. The cubic root of 51948971 is about 373.1289819323.

The spelling of 51948971 in words is "fifty-one million, nine hundred forty-eight thousand, nine hundred seventy-one".