47521345 has 8 divisors (see below), whose sum is σ = 57091176. Its totient is φ = 37973376.

The previous prime is 47521333. The next prime is 47521363. The reversal of 47521345 is 54312574.

It can be written as a sum of positive squares in 4 ways, for example, as 200704 + 47320641 = 448^2 + 6879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47521345 - 2¹⁵ = 47488577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222 + ... + 9751.

It is an arithmetic number, because the mean of its divisors is an integer number (7136397).

Almost surely, 2^47521345 is an apocalyptic number.

It is an amenable number.

47521345 is a deficient number, since it is larger than the sum of its proper divisors (9569831).

47521345 is an equidigital number, since it uses as much as digits as its factorization.

47521345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10931.

The product of its digits is 16800, while the sum is 31.

The square root of 47521345 is about 6893.5727311750. The cubic root of 47521345 is about 362.2120614780.

The spelling of 47521345 in words is "forty-seven million, five hundred twenty-one thousand, three hundred forty-five".