321313154 has 4 divisors (see below), whose sum is σ = 481969734. Its totient is φ = 160656576.

The previous prime is 321313147. The next prime is 321313159. The reversal of 321313154 is 451313123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 451313123 = 139 ⋅3246857.

It can be written as a sum of positive squares in only one way, i.e., 309936025 + 11377129 = 17605^2 + 3373^2 .

It is not an unprimeable number, because it can be changed into a prime (321313159) 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 as a sum of consecutive naturals, namely, 80328287 + ... + 80328290.

Almost surely, 2^321313154 is an apocalyptic number.

321313154 is a deficient number, since it is larger than the sum of its proper divisors (160656580).

321313154 is a wasteful number, since it uses less digits than its factorization.

321313154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160656579.

The product of its digits is 1080, while the sum is 23.

The square root of 321313154 is about 17925.2100127167. The cubic root of 321313154 is about 684.9247108542.

Adding to 321313154 its reverse (451313123), we get a palindrome (772626277).

The spelling of 321313154 in words is "three hundred twenty-one million, three hundred thirteen thousand, one hundred fifty-four".