47209481 has 6 divisors (see below), whose sum is σ = 51891546. Its totient is φ = 42917600.

The previous prime is 47209457. The next prime is 47209507. The reversal of 47209481 is 18490274.

It can be written as a sum of positive squares in only one way, i.e., 40005625 + 7203856 = 6325^2 + 2684^2 .

It is not a de Polignac number, because 47209481 - 2¹⁰ = 47208457 is a prime.

It is a super-2 number, since 2×47209481² = 4457470192578722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47209411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194960 + ... + 195201.

It is an arithmetic number, because the mean of its divisors is an integer number (8648591).

Almost surely, 2^47209481 is an apocalyptic number.

It is an amenable number.

47209481 is a deficient number, since it is larger than the sum of its proper divisors (4682065).

47209481 is a wasteful number, since it uses less digits than its factorization.

47209481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390183 (or 390172 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 47209481 is about 6870.9155867322. The cubic root of 47209481 is about 361.4179698034.

The spelling of 47209481 in words is "forty-seven million, two hundred nine thousand, four hundred eighty-one".