194351481 has 15 divisors (see below), whose sum is σ = 290515071. Its totient is φ = 129484008.

The previous prime is 194351461. The next prime is 194351489. The reversal of 194351481 is 184153491.

The square root of 194351481 is 13941.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 65755881 + 128595600 = 8109^2 + 11340^2 .

It is not a de Polignac number, because 194351481 - 2¹⁵ = 194318713 is a prime.

It is a super-2 number, since 2×194351481² = 75544996333786722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194351489) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 124695 + ... + 126243.

Almost surely, 2^194351481 is an apocalyptic number.

194351481 is the 13941-st square number.

194351481 is the 6971-st centered octagonal number.

It is an amenable number.

194351481 is a deficient number, since it is larger than the sum of its proper divisors (96163590).

194351481 is an frugal number, since it uses more digits than its factorization.

194351481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110 (or 1552 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The cubic root of 194351481 is about 579.2454327416.

Multiplying 194351481 by its sum of digits (36), we get a square (6996653316 = 83646²).

The spelling of 194351481 in words is "one hundred ninety-four million, three hundred fifty-one thousand, four hundred eighty-one".