51122705 has 8 divisors (see below), whose sum is σ = 61445952. Its totient is φ = 40832368.

The previous prime is 51122693. The next prime is 51122759. The reversal of 51122705 is 50722115.

It is a happy number.

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 51122705 - 2¹⁸ = 50860561 is a prime.

It is a super-2 number, since 2×51122705² = 5227061933034050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4667 + ... + 11136.

It is an arithmetic number, because the mean of its divisors is an integer number (7680744).

Almost surely, 2^51122705 is an apocalyptic number.

It is an amenable number.

51122705 is a deficient number, since it is larger than the sum of its proper divisors (10323247).

51122705 is a wasteful number, since it uses less digits than its factorization.

51122705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16455.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 51122705 is about 7150.0143356500. The cubic root of 51122705 is about 371.1401523648.

The spelling of 51122705 in words is "fifty-one million, one hundred twenty-two thousand, seven hundred five".