161530354 has 4 divisors (see below), whose sum is σ = 242295534. Its totient is φ = 80765176.

The previous prime is 161530333. The next prime is 161530361. The reversal of 161530354 is 453035161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 453035161 = 317 ⋅1429133.

It can be written as a sum of positive squares in only one way, i.e., 154629225 + 6901129 = 12435^2 + 2627^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40382587 + ... + 40382590.

Almost surely, 2^161530354 is an apocalyptic number.

161530354 is a deficient number, since it is larger than the sum of its proper divisors (80765180).

161530354 is an equidigital number, since it uses as much as digits as its factorization.

161530354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80765179.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 161530354 is about 12709.4592331853. The cubic root of 161530354 is about 544.6088757293.

The spelling of 161530354 in words is "one hundred sixty-one million, five hundred thirty thousand, three hundred fifty-four".