402330031421 has 4 divisors (see below), whose sum is σ = 413203816092. Its totient is φ = 391456246752.

The previous prime is 402330031417. The next prime is 402330031487. The reversal of 402330031421 is 124130033204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 160648656100 + 241681375321 = 400810^2 + 491611^2 .

It is a cyclic number.

It is not a de Polignac number, because 402330031421 - 2² = 402330031417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402330033421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5436892280 + ... + 5436892353.

It is an arithmetic number, because the mean of its divisors is an integer number (103300954023).

Almost surely, 2^402330031421 is an apocalyptic number.

It is an amenable number.

402330031421 is a deficient number, since it is larger than the sum of its proper divisors (10873784671).

402330031421 is a wasteful number, since it uses less digits than its factorization.

402330031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10873784670.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 402330031421 its reverse (124130033204), we get a palindrome (526460064625).

The spelling of 402330031421 in words is "four hundred two billion, three hundred thirty million, thirty-one thousand, four hundred twenty-one".