51280691 has 8 divisors (see below), whose sum is σ = 63934464. Its totient is φ = 39958920.

The previous prime is 51280681. The next prime is 51280693. The reversal of 51280691 is 19608215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51280691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51280693) 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, 332915 + ... + 333068.

It is an arithmetic number, because the mean of its divisors is an integer number (7991808).

Almost surely, 2^51280691 is an apocalyptic number.

51280691 is a deficient number, since it is larger than the sum of its proper divisors (12653773).

51280691 is a wasteful number, since it uses less digits than its factorization.

51280691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666001.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 51280691 is about 7161.0537632390. The cubic root of 51280691 is about 371.5220743253.

The spelling of 51280691 in words is "fifty-one million, two hundred eighty thousand, six hundred ninety-one".