2171223450 has 72 divisors (see below), whose sum is σ = 6363673056. Its totient is φ = 526356000.

The previous prime is 2171223449. The next prime is 2171223469. The reversal of 2171223450 is 543221712.

It is a super-2 number, since 2×2171223450² = 9428422539659805000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 214366 + ... + 224265.

It is an arithmetic number, because the mean of its divisors is an integer number (88384348).

Almost surely, 2^2171223450 is an apocalyptic number.

2171223450 is an abundant number, since it is smaller than the sum of its proper divisors (4192449606).

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

2171223450 is a wasteful number, since it uses less digits than its factorization.

2171223450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438660 (or 438652 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 2171223450 is about 46596.3888085761. The cubic root of 2171223450 is about 1294.8958538409.

The spelling of 2171223450 in words is "two billion, one hundred seventy-one million, two hundred twenty-three thousand, four hundred fifty".