47220415 has 32 divisors (see below), whose sum is σ = 66067200. Its totient is φ = 32037120.

The previous prime is 47220413. The next prime is 47220431. The reversal of 47220415 is 51402274.

47220415 = 401² + 402² + ... + 590².

It is not a de Polignac number, because 47220415 - 2¹ = 47220413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47220415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47220413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75976 + ... + 76594.

It is an arithmetic number, because the mean of its divisors is an integer number (2064600).

Almost surely, 2^47220415 is an apocalyptic number.

47220415 is a deficient number, since it is larger than the sum of its proper divisors (18846785).

47220415 is a wasteful number, since it uses less digits than its factorization.

47220415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 47220415 is about 6871.7112133733. The cubic root of 47220415 is about 361.4458698420.

Adding to 47220415 its reverse (51402274), we get a palindrome (98622689).

The spelling of 47220415 in words is "forty-seven million, two hundred twenty thousand, four hundred fifteen".