51018147 has 8 divisors (see below), whose sum is σ = 75582480. Its totient is φ = 34012080.

The previous prime is 51018133. The next prime is 51018161. The reversal of 51018147 is 74181015.

51018147 is a `hidden beast` number, since 510 + 1 + 8 + 147 = 666.

51018147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51018133) and next prime (51018161).

It is not a de Polignac number, because 51018147 - 2⁴ = 51018131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1889561 = 51018147 / (5 + 1 + 0 + 1 + 8 + 1 + 4 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 51018147.

It is not an unprimeable number, because it can be changed into a prime (51118147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944754 + ... + 944807.

It is an arithmetic number, because the mean of its divisors is an integer number (9447810).

Almost surely, 2^51018147 is an apocalyptic number.

51018147 is a deficient number, since it is larger than the sum of its proper divisors (24564333).

51018147 is a wasteful number, since it uses less digits than its factorization.

51018147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889570 (or 1889564 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 51018147 is about 7142.6988596748. The cubic root of 51018147 is about 370.8869565963.

The spelling of 51018147 in words is "fifty-one million, eighteen thousand, one hundred forty-seven".