201502161 has 42 divisors (see below), whose sum is σ = 351502242. Its totient is φ = 115123680.

The previous prime is 201502157. The next prime is 201502177. The reversal of 201502161 is 161205102.

201502161 is a `hidden beast` number, since 2 + 0 + 1 + 502 + 161 = 666.

It can be written as a sum of positive squares in only one way, i.e., 200930625 + 571536 = 14175^2 + 756^2 .

It is not a de Polignac number, because 201502161 - 2² = 201502157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201502181) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 32901 + ... + 38541.

It is an arithmetic number, because the mean of its divisors is an integer number (8369101).

Almost surely, 2^201502161 is an apocalyptic number.

201502161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201502161 is a deficient number, since it is larger than the sum of its proper divisors (150000081).

201502161 is an frugal number, since it uses more digits than its factorization.

201502161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5673 (or 5651 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 201502161 is about 14195.1456843528. The cubic root of 201502161 is about 586.2640124370.

Adding to 201502161 its reverse (161205102), we get a palindrome (362707263).

The spelling of 201502161 in words is "two hundred one million, five hundred two thousand, one hundred sixty-one".