51401547 has 24 divisors (see below), whose sum is σ = 79091376. Its totient is φ = 33335712.

The previous prime is 51401533. The next prime is 51401611. The reversal of 51401547 is 74510415.

It is a happy number.

It is not a de Polignac number, because 51401547 - 2⁷ = 51401419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51401547.

It is not an unprimeable number, because it can be changed into a prime (51401507) 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 23 ways as a sum of consecutive naturals, for example, 6133 + ... + 11849.

It is an arithmetic number, because the mean of its divisors is an integer number (3295474).

Almost surely, 2^51401547 is an apocalyptic number.

51401547 is a deficient number, since it is larger than the sum of its proper divisors (27689829).

51401547 is an equidigital number, since it uses as much as digits as its factorization.

51401547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5769 (or 5757 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 51401547 is about 7169.4872201574. The cubic root of 51401547 is about 371.8137074512.

The spelling of 51401547 in words is "fifty-one million, four hundred one thousand, five hundred forty-seven".