2145522321404 has 24 divisors (see below), whose sum is σ = 4681139611008. Its totient is φ = 835917787440.

The previous prime is 2145522321401. The next prime is 2145522321413. The reversal of 2145522321404 is 4041232255412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145522321401) 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 7 ways as a sum of consecutive naturals, for example, 3482990474 + ... + 3482991089.

It is an arithmetic number, because the mean of its divisors is an integer number (195047483792).

Almost surely, 2^{2145522321404} is an apocalyptic number.

It is an amenable number.

2145522321404 is an abundant number, since it is smaller than the sum of its proper divisors (2535617289604).

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

2145522321404 is a wasteful number, since it uses less digits than its factorization.

2145522321404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6965981585 (or 6965981583 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 2145522321404 its reverse (4041232255412), we get a palindrome (6186754576816).

The spelling of 2145522321404 in words is "two trillion, one hundred forty-five billion, five hundred twenty-two million, three hundred twenty-one thousand, four hundred four".