402221000523444 has 24 divisors (see below), whose sum is σ = 938602032015648. Its totient is φ = 134061329108640.

The previous prime is 402221000523383. The next prime is 402221000523481. The reversal of 402221000523444 is 444325000122204.

It is a super-2 number, since 2×402221000523444² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1542080727 + ... + 1542341534.

It is an arithmetic number, because the mean of its divisors is an integer number (39108418000652).

Almost surely, 2^{402221000523444} is an apocalyptic number.

It is an amenable number.

402221000523444 is an abundant number, since it is smaller than the sum of its proper divisors (536381031492204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

402221000523444 is a wasteful number, since it uses less digits than its factorization.

402221000523444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084433135 (or 3084433133 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 402221000523444 its reverse (444325000122204), we get a palindrome (846546000645648).

The spelling of 402221000523444 in words is "four hundred two trillion, two hundred twenty-one billion, five hundred twenty-three thousand, four hundred forty-four".