403345631 has 16 divisors (see below), whose sum is σ = 440853504. Its totient is φ = 366803424.

The previous prime is 403345627. The next prime is 403345643. The reversal of 403345631 is 136543304.

It is not a de Polignac number, because 403345631 - 2² = 403345627 is a prime.

It is a super-2 number, since 2×403345631² = 325375396093576322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 403345594 and 403345603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403345651) 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 15 ways as a sum of consecutive naturals, for example, 303290 + ... + 304616.

It is an arithmetic number, because the mean of its divisors is an integer number (27553344).

Almost surely, 2^403345631 is an apocalyptic number.

403345631 is a deficient number, since it is larger than the sum of its proper divisors (37507873).

403345631 is a wasteful number, since it uses less digits than its factorization.

403345631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 403345631 is about 20083.4666081332. The cubic root of 403345631 is about 738.8548339311.

Adding to 403345631 its reverse (136543304), we get a palindrome (539888935).

The spelling of 403345631 in words is "four hundred three million, three hundred forty-five thousand, six hundred thirty-one".