2171450040 has 64 divisors (see below), whose sum is σ = 6574154400. Its totient is φ = 573737472.

The previous prime is 2171450009. The next prime is 2171450053. The reversal of 2171450040 is 400541712.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69927 + ... + 96086.

Almost surely, 2^2171450040 is an apocalyptic number.

2171450040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171450040 is an abundant number, since it is smaller than the sum of its proper divisors (4402704360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2171450040 is a wasteful number, since it uses less digits than its factorization.

2171450040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166136 (or 166132 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 2171450040 is about 46598.8201567379. The cubic root of 2171450040 is about 1294.9408976073.

Adding to 2171450040 its reverse (400541712), we get a palindrome (2571991752).

The spelling of 2171450040 in words is "two billion, one hundred seventy-one million, four hundred fifty thousand, forty".