405502313 has 4 divisors (see below), whose sum is σ = 426844560. Its totient is φ = 384160068.

The previous prime is 405502303. The next prime is 405502381. The reversal of 405502313 is 313205504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 405502313 - 2¹⁶ = 405436777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405502303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10671095 + ... + 10671132.

It is an arithmetic number, because the mean of its divisors is an integer number (106711140).

Almost surely, 2^405502313 is an apocalyptic number.

It is an amenable number.

405502313 is a deficient number, since it is larger than the sum of its proper divisors (21342247).

405502313 is a wasteful number, since it uses less digits than its factorization.

405502313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21342246.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 405502313 is about 20137.0879970268. The cubic root of 405502313 is about 740.1693750353.

Adding to 405502313 its reverse (313205504), we get a palindrome (718707817).

The spelling of 405502313 in words is "four hundred five million, five hundred two thousand, three hundred thirteen".