313521145 has 16 divisors (see below), whose sum is σ = 431360640. Its totient is φ = 214291584.

The previous prime is 313521133. The next prime is 313521167. The reversal of 313521145 is 541125313.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 313521145 - 2⁵ = 313521113 is a prime.

It is a super-2 number, since 2×313521145² = 196591016724222050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3355 + ... + 25264.

It is an arithmetic number, because the mean of its divisors is an integer number (26960040).

Almost surely, 2^313521145 is an apocalyptic number.

313521145 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

313521145 is a deficient number, since it is larger than the sum of its proper divisors (117839495).

313521145 is a wasteful number, since it uses less digits than its factorization.

313521145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28944.

The product of its digits is 1800, while the sum is 25.

The square root of 313521145 is about 17706.5283158501. The cubic root of 313521145 is about 679.3427509026.

Adding to 313521145 its reverse (541125313), we get a palindrome (854646458).

The spelling of 313521145 in words is "three hundred thirteen million, five hundred twenty-one thousand, one hundred forty-five".