2153220505679 has 2 divisors, whose sum is σ = 2153220505680. Its totient is φ = 2153220505678.

The previous prime is 2153220505577. The next prime is 2153220505693. The reversal of 2153220505679 is 9765050223512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2153220505679 - 2¹² = 2153220501583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2153220505379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076610252839 + 1076610252840.

It is an arithmetic number, because the mean of its divisors is an integer number (1076610252840).

Almost surely, 2^{2153220505679} is an apocalyptic number.

2153220505679 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153220505679 is an equidigital number, since it uses as much as digits as its factorization.

2153220505679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134000, while the sum is 47.

The spelling of 2153220505679 in words is "two trillion, one hundred fifty-three billion, two hundred twenty million, five hundred five thousand, six hundred seventy-nine".