51634819 has 8 divisors (see below), whose sum is σ = 53622000. Its totient is φ = 49661472.

The previous prime is 51634813. The next prime is 51634841. The reversal of 51634819 is 91843615.

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 51634819 - 2⁹ = 51634307 is a prime.

It is a super-2 number, since 2×51634819² = 5332309066325522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51634813) 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, 4492 + ... + 11110.

It is an arithmetic number, because the mean of its divisors is an integer number (6702750).

Almost surely, 2^51634819 is an apocalyptic number.

51634819 is a deficient number, since it is larger than the sum of its proper divisors (1987181).

51634819 is a wasteful number, since it uses less digits than its factorization.

51634819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6917.

The product of its digits is 25920, while the sum is 37.

The square root of 51634819 is about 7185.7371925224. The cubic root of 51634819 is about 372.3753173390.

The spelling of 51634819 in words is "fifty-one million, six hundred thirty-four thousand, eight hundred nineteen".