47215905 has 32 divisors (see below), whose sum is σ = 83662848. Its totient is φ = 22545600.

The previous prime is 47215901. The next prime is 47215939. The reversal of 47215905 is 50951274.

It is not a de Polignac number, because 47215905 - 2² = 47215901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (47215901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8920 + ... + 13190.

It is an arithmetic number, because the mean of its divisors is an integer number (2614464).

Almost surely, 2^47215905 is an apocalyptic number.

It is an amenable number.

47215905 is a deficient number, since it is larger than the sum of its proper divisors (36446943).

47215905 is a wasteful number, since it uses less digits than its factorization.

47215905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357.

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 47215905 is about 6871.3830485573. The cubic root of 47215905 is about 361.4343622997.

The spelling of 47215905 in words is "forty-seven million, two hundred fifteen thousand, nine hundred five".