8161500 has 48 divisors (see below), whose sum is σ = 23770656. Its totient is φ = 2176000.

The previous prime is 8161493. The next prime is 8161511. The reversal of 8161500 is 51618.

It is a super-2 number, since 2×8161500² = 133220164500000, which contains 22 as substring.

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, 1221 + ... + 4220.

It is an arithmetic number, because the mean of its divisors is an integer number (495222).

Almost surely, 2^8161500 is an apocalyptic number.

It is an amenable number.

8161500 is an abundant number, since it is smaller than the sum of its proper divisors (15609156).

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

8161500 is a wasteful number, since it uses less digits than its factorization.

8161500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463 (or 5451 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 8161500 is about 2856.8339118682. The cubic root of 8161500 is about 201.3368772188.

The spelling of 8161500 in words is "eight million, one hundred sixty-one thousand, five hundred".