51099249 has 8 divisors (see below), whose sum is σ = 68172832. Its totient is φ = 34045920.

The previous prime is 51099211. The next prime is 51099277. The reversal of 51099249 is 94299015.

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

It is not a de Polignac number, because 51099249 - 2⁷ = 51099121 is a prime.

It is a super-2 number, since 2×51099249² = 5222266496728002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51099299) 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, 2397 + ... + 10389.

It is an arithmetic number, because the mean of its divisors is an integer number (8521604).

Almost surely, 2^51099249 is an apocalyptic number.

It is an amenable number.

51099249 is a deficient number, since it is larger than the sum of its proper divisors (17073583).

51099249 is a wasteful number, since it uses less digits than its factorization.

51099249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10127.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 51099249 is about 7148.3738710283. The cubic root of 51099249 is about 371.0833817958.

The spelling of 51099249 in words is "fifty-one million, ninety-nine thousand, two hundred forty-nine".