161305953 has 16 divisors (see below), whose sum is σ = 226678080. Its totient is φ = 101749824.

The previous prime is 161305951. The next prime is 161305957. The reversal of 161305953 is 359503161.

161305953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161305953 - 2¹ = 161305951 is a prime.

It is a super-2 number, since 2×161305953² = 52039220946476418, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161305951) 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, 67975 + ... + 70307.

It is an arithmetic number, because the mean of its divisors is an integer number (14167380).

Almost surely, 2^161305953 is an apocalyptic number.

It is an amenable number.

161305953 is a deficient number, since it is larger than the sum of its proper divisors (65372127).

161305953 is a wasteful number, since it uses less digits than its factorization.

161305953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3568.

The product of its (nonzero) digits is 12150, while the sum is 33.

The square root of 161305953 is about 12700.6280553365. The cubic root of 161305953 is about 544.3565652306.

The spelling of 161305953 in words is "one hundred sixty-one million, three hundred five thousand, nine hundred fifty-three".