2172487547 has 2 divisors, whose sum is σ = 2172487548. Its totient is φ = 2172487546.

The previous prime is 2172487507. The next prime is 2172487553. The reversal of 2172487547 is 7457842712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172487547 - 2⁶ = 2172487483 is a prime.

It is not a weakly prime, because it can be changed into another prime (2172487507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086243773 + 1086243774.

It is an arithmetic number, because the mean of its divisors is an integer number (1086243774).

Almost surely, 2^2172487547 is an apocalyptic number.

2172487547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172487547 is an equidigital number, since it uses as much as digits as its factorization.

2172487547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 878080, while the sum is 47.

The square root of 2172487547 is about 46609.9511585241. The cubic root of 2172487547 is about 1295.1471033383.

The spelling of 2172487547 in words is "two billion, one hundred seventy-two million, four hundred eighty-seven thousand, five hundred forty-seven".