51402449 has 4 divisors (see below), whose sum is σ = 58745664. Its totient is φ = 44059236.

The previous prime is 51402437. The next prime is 51402469. The reversal of 51402449 is 94420415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51402449 - 2⁸ = 51402193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51402409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3671597 + ... + 3671610.

It is an arithmetic number, because the mean of its divisors is an integer number (14686416).

Almost surely, 2^51402449 is an apocalyptic number.

It is an amenable number.

51402449 is a deficient number, since it is larger than the sum of its proper divisors (7343215).

51402449 is an equidigital number, since it uses as much as digits as its factorization.

51402449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7343214.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 51402449 is about 7169.5501253565. The cubic root of 51402449 is about 371.8158823144.

The spelling of 51402449 in words is "fifty-one million, four hundred two thousand, four hundred forty-nine".