47721235 has 4 divisors (see below), whose sum is σ = 57265488. Its totient is φ = 38176984.

The previous prime is 47721199. The next prime is 47721241. The reversal of 47721235 is 53212774.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53212774 = 2 ⋅26606387.

It is a cyclic number.

It is not a de Polignac number, because 47721235 - 2²¹ = 45624083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47721197 and 47721206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4772119 + ... + 4772128.

It is an arithmetic number, because the mean of its divisors is an integer number (14316372).

Almost surely, 2^47721235 is an apocalyptic number.

47721235 is a deficient number, since it is larger than the sum of its proper divisors (9544253).

47721235 is an equidigital number, since it uses as much as digits as its factorization.

47721235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544252.

The product of its digits is 11760, while the sum is 31.

The square root of 47721235 is about 6908.0558046385. The cubic root of 47721235 is about 362.7192110505.

It can be divided in two parts, 477 and 21235, that added together give a palindrome (21712).

The spelling of 47721235 in words is "forty-seven million, seven hundred twenty-one thousand, two hundred thirty-five".