75151447 has 12 divisors (see below), whose sum is σ = 87652776. Its totient is φ = 64244880.

The previous prime is 75151411. The next prime is 75151457. The reversal of 75151447 is 74415157.

It is a Cunningham number, because it is equal to 422³-1.

It is a de Polignac number, because none of the positive numbers 2^k-75151447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75151457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18808 + ... + 22450.

It is an arithmetic number, because the mean of its divisors is an integer number (7304398).

Almost surely, 2^75151447 is an apocalyptic number.

75151447 is a deficient number, since it is larger than the sum of its proper divisors (12501329).

75151447 is a wasteful number, since it uses less digits than its factorization.

75151447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4078 (or 4071 counting only the distinct ones).

The product of its digits is 19600, while the sum is 34.

The square root of 75151447 is about 8668.9934248447. The cubic root of 75151447 is about 421.9999981282. Note that the first 5 decimals are identical.

The spelling of 75151447 in words is "seventy-five million, one hundred fifty-one thousand, four hundred forty-seven".