51140975 has 24 divisors (see below), whose sum is σ = 65619312. Its totient is φ = 39513600.

The previous prime is 51140963. The next prime is 51140977. The reversal of 51140975 is 57904115.

51140975 = T₃₇₁ + T₃₇₂ + ... + T₇₀₉.

It is a de Polignac number, because none of the positive numbers 2^k-51140975 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 (51140977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121265 + ... + 121685.

It is an arithmetic number, because the mean of its divisors is an integer number (2734138).

Almost surely, 2^51140975 is an apocalyptic number.

51140975 is a deficient number, since it is larger than the sum of its proper divisors (14478337).

51140975 is a wasteful number, since it uses less digits than its factorization.

51140975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 582 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 51140975 is about 7151.2918413389. The cubic root of 51140975 is about 371.1843592261.

The spelling of 51140975 in words is "fifty-one million, one hundred forty thousand, nine hundred seventy-five".