161019430 has 32 divisors (see below), whose sum is σ = 340508448. Its totient is φ = 54048000.

The previous prime is 161019421. The next prime is 161019431. The reversal of 161019430 is 34910161.

161019430 = 386² + 387² + ... + 814².

161019430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161019395 and 161019404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161019431) 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, 54871 + ... + 57730.

It is an arithmetic number, because the mean of its divisors is an integer number (10640889).

Almost surely, 2^161019430 is an apocalyptic number.

161019430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161019430 is an abundant number, since it is smaller than the sum of its proper divisors (179489018).

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

161019430 is a wasteful number, since it uses less digits than its factorization.

161019430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112632.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 161019430 is about 12689.3431666103. The cubic root of 161019430 is about 544.0340660436.

Adding to 161019430 its reverse (34910161), we get a palindrome (195929591).

The spelling of 161019430 in words is "one hundred sixty-one million, nineteen thousand, four hundred thirty".