51449305 has 16 divisors (see below), whose sum is σ = 64617984. Its totient is φ = 39277440.

The previous prime is 51449287. The next prime is 51449317. The reversal of 51449305 is 50394415.

It is not a de Polignac number, because 51449305 - 2¹¹ = 51447257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9042 + ... + 13588.

It is an arithmetic number, because the mean of its divisors is an integer number (4038624).

Almost surely, 2^51449305 is an apocalyptic number.

It is an amenable number.

51449305 is a deficient number, since it is larger than the sum of its proper divisors (13168679).

51449305 is a wasteful number, since it uses less digits than its factorization.

51449305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4656.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 51449305 is about 7172.8170895402. The cubic root of 51449305 is about 371.9288244950.

The spelling of 51449305 in words is "fifty-one million, four hundred forty-nine thousand, three hundred five".