51685522 has 32 divisors (see below), whose sum is σ = 91907712. Its totient is φ = 21337344.

The previous prime is 51685519. The next prime is 51685523. The reversal of 51685522 is 22558615.

It is not an unprimeable number, because it can be changed into a prime (51685523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58093 + ... + 58975.

It is an arithmetic number, because the mean of its divisors is an integer number (2872116).

Almost surely, 2^51685522 is an apocalyptic number.

51685522 is a deficient number, since it is larger than the sum of its proper divisors (40222190).

51685522 is a wasteful number, since it uses less digits than its factorization.

51685522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042.

The product of its digits is 24000, while the sum is 34.

The square root of 51685522 is about 7189.2643573595. The cubic root of 51685522 is about 372.4971625687.

The spelling of 51685522 in words is "fifty-one million, six hundred eighty-five thousand, five hundred twenty-two".