2157475547 has 2 divisors, whose sum is σ = 2157475548. Its totient is φ = 2157475546.

The previous prime is 2157475531. The next prime is 2157475591. The reversal of 2157475547 is 7455747512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2157475547 - 2⁴ = 2157475531 is a prime.

It is not a weakly prime, because it can be changed into another prime (2157472547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078737773 + 1078737774.

It is an arithmetic number, because the mean of its divisors is an integer number (1078737774).

Almost surely, 2^2157475547 is an apocalyptic number.

2157475547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2157475547 is an equidigital number, since it uses as much as digits as its factorization.

2157475547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1372000, while the sum is 47.

The square root of 2157475547 is about 46448.6334244615. The cubic root of 2157475547 is about 1292.1570279721.

The spelling of 2157475547 in words is "two billion, one hundred fifty-seven million, four hundred seventy-five thousand, five hundred forty-seven".