51604106 has 4 divisors (see below), whose sum is σ = 77406162. Its totient is φ = 25802052.

The previous prime is 51604103. The next prime is 51604121. The reversal of 51604106 is 60140615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60140615 = 5 ⋅12028123.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 4558225 = 6859^2 + 2135^2 .

It is not an unprimeable number, because it can be changed into a prime (51604103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12901025 + ... + 12901028.

Almost surely, 2^51604106 is an apocalyptic number.

51604106 is a deficient number, since it is larger than the sum of its proper divisors (25802056).

51604106 is a wasteful number, since it uses less digits than its factorization.

51604106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25802055.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51604106 is about 7183.5997939752. The cubic root of 51604106 is about 372.3014716171.

The spelling of 51604106 in words is "fifty-one million, six hundred four thousand, one hundred six".