47775145 has 8 divisors (see below), whose sum is σ = 62542080. Its totient is φ = 34745520.

The previous prime is 47775113. The next prime is 47775173. The reversal of 47775145 is 54157774.

It is a happy number.

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

It is not a de Polignac number, because 47775145 - 2⁵ = 47775113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47775098 and 47775107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434265 + ... + 434374.

It is an arithmetic number, because the mean of its divisors is an integer number (7817760).

Almost surely, 2^47775145 is an apocalyptic number.

It is an amenable number.

47775145 is a deficient number, since it is larger than the sum of its proper divisors (14766935).

47775145 is a wasteful number, since it uses less digits than its factorization.

47775145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868655.

The product of its digits is 137200, while the sum is 40.

The square root of 47775145 is about 6911.9566694244. The cubic root of 47775145 is about 362.8557458930.

The spelling of 47775145 in words is "forty-seven million, seven hundred seventy-five thousand, one hundred forty-five".