161534357 has 4 divisors (see below), whose sum is σ = 171036396. Its totient is φ = 152032320.

The previous prime is 161534339. The next prime is 161534363. The reversal of 161534357 is 753435161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69872881 + 91661476 = 8359^2 + 9574^2 .

It is a cyclic number.

It is not a de Polignac number, because 161534357 - 2¹⁴ = 161517973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161534557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4750994 + ... + 4751027.

It is an arithmetic number, because the mean of its divisors is an integer number (42759099).

Almost surely, 2^161534357 is an apocalyptic number.

161534357 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

161534357 is a deficient number, since it is larger than the sum of its proper divisors (9502039).

161534357 is an equidigital number, since it uses as much as digits as its factorization.

161534357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9502038.

The product of its digits is 37800, while the sum is 35.

The square root of 161534357 is about 12709.6167133395. The cubic root of 161534357 is about 544.6133744737.

The spelling of 161534357 in words is "one hundred sixty-one million, five hundred thirty-four thousand, three hundred fifty-seven".