51340275 has 72 divisors (see below), whose sum is σ = 108055584. Its totient is φ = 22809600.

The previous prime is 51340259. The next prime is 51340319. The reversal of 51340275 is 57204315.

It is a happy number.

51340275 is a `hidden beast` number, since 51 + 340 + 275 = 666.

It is not a de Polignac number, because 51340275 - 2⁴ = 51340259 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 57835 + ... + 58715.

It is an arithmetic number, because the mean of its divisors is an integer number (1500772).

Almost surely, 2^51340275 is an apocalyptic number.

51340275 is an abundant number, since it is smaller than the sum of its proper divisors (56715309).

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

51340275 is a wasteful number, since it uses less digits than its factorization.

51340275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 51340275 is about 7165.2128370342. The cubic root of 51340275 is about 371.6659114608.

It can be divided in two parts, 51340 and 275, that added together give a palindrome (51615).

The spelling of 51340275 in words is "fifty-one million, three hundred forty thousand, two hundred seventy-five".