2161660232 has 32 divisors (see below), whose sum is σ = 4250345400. Its totient is φ = 1029256704.

The previous prime is 2161660223. The next prime is 2161660273. The reversal of 2161660232 is 2320661612.

It can be written as a sum of positive squares in 4 ways, for example, as 2071524196 + 90136036 = 45514^2 + 9494^2 .

It is a super-3 number, since 3×2161660232³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 2161660195 and 2161660204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46883 + ... + 80754.

Almost surely, 2^2161660232 is an apocalyptic number.

It is an amenable number.

2161660232 is a deficient number, since it is larger than the sum of its proper divisors (2088685168).

2161660232 is a wasteful number, since it uses less digits than its factorization.

2161660232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127745 (or 127741 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2161660232 is about 46493.6579761154. The cubic root of 2161660232 is about 1292.9919200731.

The spelling of 2161660232 in words is "two billion, one hundred sixty-one million, six hundred sixty thousand, two hundred thirty-two".