55452152100421 has 2 divisors, whose sum is σ = 55452152100422. Its totient is φ = 55452152100420.

The previous prime is 55452152100407. The next prime is 55452152100451. The reversal of 55452152100421 is 12400125125455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54148184517025 + 1303967583396 = 7358545^2 + 1141914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55452152100421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55452152100451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27726076050210 + 27726076050211.

It is an arithmetic number, because the mean of its divisors is an integer number (27726076050211).

Almost surely, 2^{55452152100421} is an apocalyptic number.

It is an amenable number.

55452152100421 is a deficient number, since it is larger than the sum of its proper divisors (1).

55452152100421 is an equidigital number, since it uses as much as digits as its factorization.

55452152100421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80000, while the sum is 37.

Adding to 55452152100421 its reverse (12400125125455), we get a palindrome (67852277225876).

The spelling of 55452152100421 in words is "fifty-five trillion, four hundred fifty-two billion, one hundred fifty-two million, one hundred thousand, four hundred twenty-one".