51449471 has 4 divisors (see below), whose sum is σ = 51509952. Its totient is φ = 51388992.

The previous prime is 51449467. The next prime is 51449477. The reversal of 51449471 is 17494415.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51449471 - 2² = 51449467 is a prime.

It is a super-3 number, since 3×51449471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51449477) 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, 28946 + ... + 30671.

It is an arithmetic number, because the mean of its divisors is an integer number (12877488).

Almost surely, 2^51449471 is an apocalyptic number.

51449471 is a deficient number, since it is larger than the sum of its proper divisors (60481).

51449471 is an equidigital number, since it uses as much as digits as its factorization.

51449471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60480.

The product of its digits is 20160, while the sum is 35.

The square root of 51449471 is about 7172.8286609956. The cubic root of 51449471 is about 371.9292245012.

The spelling of 51449471 in words is "fifty-one million, four hundred forty-nine thousand, four hundred seventy-one".