47150721 has 16 divisors (see below), whose sum is σ = 72107520. Its totient is φ = 30419280.

The previous prime is 47150657. The next prime is 47150731. The reversal of 47150721 is 12705174.

It is not a de Polignac number, because 47150721 - 2⁶ = 47150657 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (47150731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27330 + ... + 29003.

It is an arithmetic number, because the mean of its divisors is an integer number (4506720).

Almost surely, 2^47150721 is an apocalyptic number.

It is an amenable number.

47150721 is a deficient number, since it is larger than the sum of its proper divisors (24956799).

47150721 is a wasteful number, since it uses less digits than its factorization.

47150721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56373 (or 56367 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 47150721 is about 6866.6382604590. The cubic root of 47150721 is about 361.2679594205.

Adding to 47150721 its reverse (12705174), we get a palindrome (59855895).

The spelling of 47150721 in words is "forty-seven million, one hundred fifty thousand, seven hundred twenty-one".