51693554 has 16 divisors (see below), whose sum is σ = 87319296. Its totient is φ = 22738800.

The previous prime is 51693553. The next prime is 51693557. The reversal of 51693554 is 45539615.

It is not an unprimeable number, because it can be changed into a prime (51693553) 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, 37217 + ... + 38580.

It is an arithmetic number, because the mean of its divisors is an integer number (5457456).

Almost surely, 2^51693554 is an apocalyptic number.

51693554 is a deficient number, since it is larger than the sum of its proper divisors (35625742).

51693554 is a wasteful number, since it uses less digits than its factorization.

51693554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75841.

The product of its digits is 81000, while the sum is 38.

The square root of 51693554 is about 7189.8229463597. The cubic root of 51693554 is about 372.5164570901.

The spelling of 51693554 in words is "fifty-one million, six hundred ninety-three thousand, five hundred fifty-four".