51604149 has 8 divisors (see below), whose sum is σ = 69774912. Its totient is φ = 33918080.

The previous prime is 51604127. The next prime is 51604183. The reversal of 51604149 is 94140615.

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 51604149 - 2¹¹ = 51602101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51604349) 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, 120924 + ... + 121349.

It is an arithmetic number, because the mean of its divisors is an integer number (8721864).

Almost surely, 2^51604149 is an apocalyptic number.

It is an amenable number.

51604149 is a deficient number, since it is larger than the sum of its proper divisors (18170763).

51604149 is a wasteful number, since it uses less digits than its factorization.

51604149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242347.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 51604149 is about 7183.6027869030. The cubic root of 51604149 is about 372.3015750259.

The spelling of 51604149 in words is "fifty-one million, six hundred four thousand, one hundred forty-nine".