47491251 has 16 divisors (see below), whose sum is σ = 69963264. Its totient is φ = 28502144.

The previous prime is 47491237. The next prime is 47491253. The reversal of 47491251 is 15219474.

It is a happy number.

47491251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 47491251 - 2¹⁵ = 47458483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47491253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19071 + ... + 21416.

It is an arithmetic number, because the mean of its divisors is an integer number (4372704).

Almost surely, 2^47491251 is an apocalyptic number.

47491251 is a deficient number, since it is larger than the sum of its proper divisors (22472013).

47491251 is a wasteful number, since it uses less digits than its factorization.

47491251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40530.

The product of its digits is 10080, while the sum is 33.

The square root of 47491251 is about 6891.3896276441. The cubic root of 47491251 is about 362.1355855872.

The spelling of 47491251 in words is "forty-seven million, four hundred ninety-one thousand, two hundred fifty-one".