51619449 has 16 divisors (see below), whose sum is σ = 81371520. Its totient is φ = 28479360.

The previous prime is 51619439. The next prime is 51619471. The reversal of 51619449 is 94491615.

It is not a de Polignac number, because 51619449 - 2⁸ = 51619193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51619439) 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, 41772 + ... + 42989.

It is an arithmetic number, because the mean of its divisors is an integer number (5085720).

Almost surely, 2^51619449 is an apocalyptic number.

It is an amenable number.

51619449 is a deficient number, since it is larger than the sum of its proper divisors (29752071).

51619449 is a wasteful number, since it uses less digits than its factorization.

51619449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84800.

The product of its digits is 38880, while the sum is 39.

The square root of 51619449 is about 7184.6676332312. The cubic root of 51619449 is about 372.3383656804.

The spelling of 51619449 in words is "fifty-one million, six hundred nineteen thousand, four hundred forty-nine".