51147045 has 40 divisors (see below), whose sum is σ = 93671424. Its totient is φ = 26688096.

The previous prime is 51147043. The next prime is 51147059. The reversal of 51147045 is 54074115.

It is a happy number.

It is not a de Polignac number, because 51147045 - 2¹ = 51147043 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51147043) 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 39 ways as a sum of consecutive naturals, for example, 17692 + ... + 20378.

Almost surely, 2^51147045 is an apocalyptic number.

It is an amenable number.

51147045 is a deficient number, since it is larger than the sum of its proper divisors (42524379).

51147045 is a wasteful number, since it uses less digits than its factorization.

51147045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751 (or 2742 counting only the distinct ones).

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

The square root of 51147045 is about 7151.7162275918. The cubic root of 51147045 is about 371.1990441236.

The spelling of 51147045 in words is "fifty-one million, one hundred forty-seven thousand, forty-five".