2171542473 has 8 divisors (see below), whose sum is σ = 3217100000. Its totient is φ = 1447694964.

The previous prime is 2171542463. The next prime is 2171542487. The reversal of 2171542473 is 3742451712.

2171542473 is a `hidden beast` number, since 2 + 1 + 71 + 542 + 47 + 3 = 666.

2171542473 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2171542473 - 2²¹ = 2169445321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2171542403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40213723 + ... + 40213776.

It is an arithmetic number, because the mean of its divisors is an integer number (402137500).

Almost surely, 2^2171542473 is an apocalyptic number.

It is an amenable number.

2171542473 is a deficient number, since it is larger than the sum of its proper divisors (1045557527).

2171542473 is an equidigital number, since it uses as much as digits as its factorization.

2171542473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80427508 (or 80427502 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 2171542473 is about 46599.8119416806. The cubic root of 2171542473 is about 1294.9592714391.

It can be divided in two parts, 2171 and 542473, that added together give a square (544644 = 738²).

The spelling of 2171542473 in words is "two billion, one hundred seventy-one million, five hundred forty-two thousand, four hundred seventy-three".