14155602421 has 2 divisors, whose sum is σ = 14155602422. Its totient is φ = 14155602420.

The previous prime is 14155602403. The next prime is 14155602427. The reversal of 14155602421 is 12420655141.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13636400625 + 519201796 = 116775^2 + 22786^2 .

It is a cyclic number.

It is not a de Polignac number, because 14155602421 - 2¹¹ = 14155600373 is a prime.

It is a super-2 number, since 2×14155602421² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14155602427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7077801210 + 7077801211.

It is an arithmetic number, because the mean of its divisors is an integer number (7077801211).

Almost surely, 2^14155602421 is an apocalyptic number.

It is an amenable number.

14155602421 is a deficient number, since it is larger than the sum of its proper divisors (1).

14155602421 is an equidigital number, since it uses as much as digits as its factorization.

14155602421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 14155602421 in words is "fourteen billion, one hundred fifty-five million, six hundred two thousand, four hundred twenty-one".