51407285 has 8 divisors (see below), whose sum is σ = 63816120. Its totient is φ = 39707584.

The previous prime is 51407281. The next prime is 51407309. The reversal of 51407285 is 58270415.

It can be written as a sum of positive squares in 4 ways, for example, as 11135569 + 40271716 = 3337^2 + 6346^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51407285 - 2² = 51407281 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51407281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177122 + ... + 177411.

It is an arithmetic number, because the mean of its divisors is an integer number (7977015).

Almost surely, 2^51407285 is an apocalyptic number.

It is an amenable number.

51407285 is a deficient number, since it is larger than the sum of its proper divisors (12408835).

51407285 is a wasteful number, since it uses less digits than its factorization.

51407285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354567.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51407285 is about 7169.8873770792. The cubic root of 51407285 is about 371.8275422337.

The spelling of 51407285 in words is "fifty-one million, four hundred seven thousand, two hundred eighty-five".