47215427 has 4 divisors (see below), whose sum is σ = 53960496. Its totient is φ = 40470360.

The previous prime is 47215417. The next prime is 47215439. The reversal of 47215427 is 72451274.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 47215427 - 2¹² = 47211331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47215393 and 47215402.

It is not an unprimeable number, because it can be changed into a prime (47215417) 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, 3372524 + ... + 3372537.

It is an arithmetic number, because the mean of its divisors is an integer number (13490124).

Almost surely, 2^47215427 is an apocalyptic number.

47215427 is a deficient number, since it is larger than the sum of its proper divisors (6745069).

47215427 is an equidigital number, since it uses as much as digits as its factorization.

47215427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6745068.

The product of its digits is 15680, while the sum is 32.

The square root of 47215427 is about 6871.3482665340. The cubic root of 47215427 is about 361.4331426104.

The spelling of 47215427 in words is "forty-seven million, two hundred fifteen thousand, four hundred twenty-seven".