51402547 has 8 divisors (see below), whose sum is σ = 59285600. Its totient is φ = 43654464.

The previous prime is 51402521. The next prime is 51402551. The reversal of 51402547 is 74520415.

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

It is not a de Polignac number, because 51402547 - 2²³ = 43013939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51402347) 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, 32922 + ... + 34447.

It is an arithmetic number, because the mean of its divisors is an integer number (7410700).

Almost surely, 2^51402547 is an apocalyptic number.

51402547 is a deficient number, since it is larger than the sum of its proper divisors (7883053).

51402547 is a wasteful number, since it uses less digits than its factorization.

51402547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67485.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 51402547 is about 7169.5569598128. The cubic root of 51402547 is about 371.8161186062.

The spelling of 51402547 in words is "fifty-one million, four hundred two thousand, five hundred forty-seven".