161451534 has 16 divisors (see below), whose sum is σ = 333319680. Its totient is φ = 52081080.

The previous prime is 161451529. The next prime is 161451571. The reversal of 161451534 is 435154161.

It is a happy number.

161451534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433824 + ... + 434195.

It is an arithmetic number, because the mean of its divisors is an integer number (20832480).

Almost surely, 2^161451534 is an apocalyptic number.

161451534 is an abundant number, since it is smaller than the sum of its proper divisors (171868146).

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

161451534 is a wasteful number, since it uses less digits than its factorization.

161451534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868055.

The product of its digits is 7200, while the sum is 30.

The square root of 161451534 is about 12706.3580147893. The cubic root of 161451534 is about 544.5202792634.

The spelling of 161451534 in words is "one hundred sixty-one million, four hundred fifty-one thousand, five hundred thirty-four".