313128154 has 4 divisors (see below), whose sum is σ = 469692234. Its totient is φ = 156564076.

The previous prime is 313128149. The next prime is 313128157. The reversal of 313128154 is 451821313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 313113025 + 15129 = 17695^2 + 123^2 .

It is a super-3 number, since 3×313128154³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (313128157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78282037 + ... + 78282040.

Almost surely, 2^313128154 is an apocalyptic number.

313128154 is a deficient number, since it is larger than the sum of its proper divisors (156564080).

313128154 is a wasteful number, since it uses less digits than its factorization.

313128154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156564079.

The product of its digits is 2880, while the sum is 28.

The square root of 313128154 is about 17695.4274884785. The cubic root of 313128154 is about 679.0587857771.

Adding to 313128154 its reverse (451821313), we get a palindrome (764949467).

The spelling of 313128154 in words is "three hundred thirteen million, one hundred twenty-eight thousand, one hundred fifty-four".