51867449 has 4 divisors (see below), whose sum is σ = 52578036. Its totient is φ = 51156864.

The previous prime is 51867421. The next prime is 51867463. The reversal of 51867449 is 94476815.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16345849 + 35521600 = 4043^2 + 5960^2 .

It is a cyclic number.

It is not a de Polignac number, because 51867449 - 2¹⁶ = 51801913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51867499) 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, 355184 + ... + 355329.

It is an arithmetic number, because the mean of its divisors is an integer number (13144509).

Almost surely, 2^51867449 is an apocalyptic number.

It is an amenable number.

51867449 is a deficient number, since it is larger than the sum of its proper divisors (710587).

51867449 is an equidigital number, since it uses as much as digits as its factorization.

51867449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710586.

The product of its digits is 241920, while the sum is 44.

The square root of 51867449 is about 7201.9059282943. The cubic root of 51867449 is about 372.9336996156.

The spelling of 51867449 in words is "fifty-one million, eight hundred sixty-seven thousand, four hundred forty-nine".