47521823 has 2 divisors, whose sum is σ = 47521824. Its totient is φ = 47521822.

The previous prime is 47521819. The next prime is 47521847. The reversal of 47521823 is 32812574.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47521823 - 2² = 47521819 is a prime.

It is a super-2 number, since 2×47521823² = 4516647322486658, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 47521823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40521823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23760911 + 23760912.

It is an arithmetic number, because the mean of its divisors is an integer number (23760912).

Almost surely, 2^47521823 is an apocalyptic number.

47521823 is a deficient number, since it is larger than the sum of its proper divisors (1).

47521823 is an equidigital number, since it uses as much as digits as its factorization.

47521823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 47521823 is about 6893.6074010637. The cubic root of 47521823 is about 362.2132759272.

The spelling of 47521823 in words is "forty-seven million, five hundred twenty-one thousand, eight hundred twenty-three".