47745161 has 4 divisors (see below), whose sum is σ = 48183300. Its totient is φ = 47307024.

The previous prime is 47745121. The next prime is 47745199. The reversal of 47745161 is 16154774.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16154774 = 2 ⋅8077387.

It can be written as a sum of positive squares in 2 ways, for example, as 26988025 + 20757136 = 5195^2 + 4556^2 .

It is a cyclic number.

It is not a de Polignac number, because 47745161 - 2⁶ = 47745097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47745121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218906 + ... + 219123.

It is an arithmetic number, because the mean of its divisors is an integer number (12045825).

Almost surely, 2^47745161 is an apocalyptic number.

It is an amenable number.

47745161 is a deficient number, since it is larger than the sum of its proper divisors (438139).

47745161 is a wasteful number, since it uses less digits than its factorization.

47745161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438138.

The product of its digits is 23520, while the sum is 35.

The square root of 47745161 is about 6909.7873339199. The cubic root of 47745161 is about 362.7798197772.

The spelling of 47745161 in words is "forty-seven million, seven hundred forty-five thousand, one hundred sixty-one".