51649298 has 8 divisors (see below), whose sum is σ = 82031292. Its totient is φ = 24305536.

The previous prime is 51649291. The next prime is 51649313. The reversal of 51649298 is 89294615.

It can be written as a sum of positive squares in 2 ways, for example, as 50310649 + 1338649 = 7093^2 + 1157^2 .

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

It is a super-3 number, since 3×51649298³ (a number of 24 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 759515 + ... + 759582.

Almost surely, 2^51649298 is an apocalyptic number.

51649298 is a deficient number, since it is larger than the sum of its proper divisors (30381994).

51649298 is a wasteful number, since it uses less digits than its factorization.

51649298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519116.

The product of its digits is 155520, while the sum is 44.

The square root of 51649298 is about 7186.7446037827. The cubic root of 51649298 is about 372.4101202003.

The spelling of 51649298 in words is "fifty-one million, six hundred forty-nine thousand, two hundred ninety-eight".