51649297 has 8 divisors (see below), whose sum is σ = 59087552. Its totient is φ = 44226000.

The previous prime is 51649291. The next prime is 51649313. The reversal of 51649297 is 79294615.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51649297 - 2³ = 51649289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51649291) 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, 5047 + ... + 11347.

It is an arithmetic number, because the mean of its divisors is an integer number (7385944).

Almost surely, 2^51649297 is an apocalyptic number.

It is an amenable number.

51649297 is a deficient number, since it is larger than the sum of its proper divisors (7438255).

51649297 is a wasteful number, since it uses less digits than its factorization.

51649297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7479.

The product of its digits is 136080, while the sum is 43.

The square root of 51649297 is about 7186.7445342102. The cubic root of 51649297 is about 372.4101177969.

The spelling of 51649297 in words is "fifty-one million, six hundred forty-nine thousand, two hundred ninety-seven".