165531470 has 32 divisors (see below), whose sum is σ = 324209088. Its totient is φ = 60484608.

The previous prime is 165531463. The next prime is 165531479. The reversal of 165531470 is 74135561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165531479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6047 + ... + 19173.

It is an arithmetic number, because the mean of its divisors is an integer number (10131534).

Almost surely, 2^165531470 is an apocalyptic number.

165531470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165531470 is a deficient number, since it is larger than the sum of its proper divisors (158677618).

165531470 is a wasteful number, since it uses less digits than its factorization.

165531470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13244.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 165531470 is about 12865.9033884139. The cubic root of 165531470 is about 549.0689150308.

The spelling of 165531470 in words is "one hundred sixty-five million, five hundred thirty-one thousand, four hundred seventy".