46155516221 has 2 divisors, whose sum is σ = 46155516222. Its totient is φ = 46155516220.

The previous prime is 46155516193. The next prime is 46155516233. The reversal of 46155516221 is 12261555164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27220380196 + 18935136025 = 164986^2 + 137605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-46155516221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46155516721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23077758110 + 23077758111.

It is an arithmetic number, because the mean of its divisors is an integer number (23077758111).

Almost surely, 2^46155516221 is an apocalyptic number.

It is an amenable number.

46155516221 is a deficient number, since it is larger than the sum of its proper divisors (1).

46155516221 is an equidigital number, since it uses as much as digits as its factorization.

46155516221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 38.

The spelling of 46155516221 in words is "forty-six billion, one hundred fifty-five million, five hundred sixteen thousand, two hundred twenty-one".