2171626630 has 32 divisors (see below), whose sum is σ = 3974357664. Its totient is φ = 854182656.

The previous prime is 2171626621. The next prime is 2171626637. The reversal of 2171626630 is 366261712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171626637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249024 + ... + 257596.

It is an arithmetic number, because the mean of its divisors is an integer number (124198677).

Almost surely, 2^2171626630 is an apocalyptic number.

2171626630 is a deficient number, since it is larger than the sum of its proper divisors (1802731034).

2171626630 is a wasteful number, since it uses less digits than its factorization.

2171626630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2171626630 is about 46600.7149086792. The cubic root of 2171626630 is about 1294.9759997142.

The spelling of 2171626630 in words is "two billion, one hundred seventy-one million, six hundred twenty-six thousand, six hundred thirty".