338401561 has 4 divisors (see below), whose sum is σ = 338547492. Its totient is φ = 338255632.

The previous prime is 338401559. The next prime is 338401573. The reversal of 338401561 is 165104833.

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 209351961 + 129049600 = 14469^2 + 11360^2 .

It is a cyclic number.

It is not a de Polignac number, because 338401561 - 2¹ = 338401559 is a prime.

It is a super-2 number, since 2×338401561² = 229031232974473442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338401361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69430 + ... + 74143.

It is an arithmetic number, because the mean of its divisors is an integer number (84636873).

Almost surely, 2^338401561 is an apocalyptic number.

It is an amenable number.

338401561 is a deficient number, since it is larger than the sum of its proper divisors (145931).

338401561 is a wasteful number, since it uses less digits than its factorization.

338401561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145930.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 338401561 is about 18395.6940885632. The cubic root of 338401561 is about 696.8577257571.

The spelling of 338401561 in words is "three hundred thirty-eight million, four hundred one thousand, five hundred sixty-one".