47815541 has 2 divisors, whose sum is σ = 47815542. Its totient is φ = 47815540.

The previous prime is 47815529. The next prime is 47815601. The reversal of 47815541 is 14551874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27520516 + 20295025 = 5246^2 + 4505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47815541 is a prime.

It is a super-2 number, since 2×47815541² = 4572651922245362, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47815741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23907770 + 23907771.

It is an arithmetic number, because the mean of its divisors is an integer number (23907771).

Almost surely, 2^47815541 is an apocalyptic number.

It is an amenable number.

47815541 is a deficient number, since it is larger than the sum of its proper divisors (1).

47815541 is an equidigital number, since it uses as much as digits as its factorization.

47815541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The square root of 47815541 is about 6914.8782346474. The cubic root of 47815541 is about 362.9579872806.

The spelling of 47815541 in words is "forty-seven million, eight hundred fifteen thousand, five hundred forty-one".