2190331400087 has 4 divisors (see below), whose sum is σ = 2190437198136. Its totient is φ = 2190225602040.

The previous prime is 2190331400077. The next prime is 2190331400099. The reversal of 2190331400087 is 7800041330912.

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

It is a cyclic number.

It is not a de Polignac number, because 2190331400087 - 2¹⁰ = 2190331399063 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2190331400087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190331400077) 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, 52867964 + ... + 52909377.

It is an arithmetic number, because the mean of its divisors is an integer number (547609299534).

Almost surely, 2^{2190331400087} is an apocalyptic number.

2190331400087 is a deficient number, since it is larger than the sum of its proper divisors (105798049).

2190331400087 is a wasteful number, since it uses less digits than its factorization.

2190331400087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105798048.

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 2190331400087 its reverse (7800041330912), we get a palindrome (9990372730999).

The spelling of 2190331400087 in words is "two trillion, one hundred ninety billion, three hundred thirty-one million, four hundred thousand, eighty-seven".