2166515450 has 48 divisors (see below), whose sum is σ = 4479061536. Its totient is φ = 772948800.

The previous prime is 2166515447. The next prime is 2166515473. The reversal of 2166515450 is 545156612.

It is a self number, because there is not a number n which added to its sum of digits gives 2166515450.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8012 + ... + 66311.

It is an arithmetic number, because the mean of its divisors is an integer number (93313782).

Almost surely, 2^2166515450 is an apocalyptic number.

2166515450 is an abundant number, since it is smaller than the sum of its proper divisors (2312546086).

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

2166515450 is a wasteful number, since it uses less digits than its factorization.

2166515450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74399 (or 74394 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 2166515450 is about 46545.8424566577. The cubic root of 2166515450 is about 1293.9592419082.

The spelling of 2166515450 in words is "two billion, one hundred sixty-six million, five hundred fifteen thousand, four hundred fifty".