161253533 has 16 divisors (see below), whose sum is σ = 190270080. Its totient is φ = 133785600.

The previous prime is 161253527. The next prime is 161253541. The reversal of 161253533 is 335352161.

It is a cyclic number.

It is not a de Polignac number, because 161253533 - 2¹⁴ = 161237149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161253496 and 161253505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161253503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35453 + ... + 39741.

It is an arithmetic number, because the mean of its divisors is an integer number (11891880).

Almost surely, 2^161253533 is an apocalyptic number.

It is an amenable number.

161253533 is a deficient number, since it is larger than the sum of its proper divisors (29016547).

161253533 is a wasteful number, since it uses less digits than its factorization.

161253533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468.

The product of its digits is 8100, while the sum is 29.

The square root of 161253533 is about 12698.5642101775. The cubic root of 161253533 is about 544.2975918692.

The spelling of 161253533 in words is "one hundred sixty-one million, two hundred fifty-three thousand, five hundred thirty-three".