221557070445 has 16 divisors (see below), whose sum is σ = 354498616320. Its totient is φ = 118161336384.

The previous prime is 221557070443. The next prime is 221557070479. The reversal of 221557070445 is 544070755122.

It is not a de Polignac number, because 221557070445 - 2¹ = 221557070443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221557070397 and 221557070406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221557070443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 787251 + ... + 1030959.

It is an arithmetic number, because the mean of its divisors is an integer number (22156163520).

Almost surely, 2^221557070445 is an apocalyptic number.

It is an amenable number.

221557070445 is a deficient number, since it is larger than the sum of its proper divisors (132941545875).

221557070445 is a wasteful number, since it uses less digits than its factorization.

221557070445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304324.

The product of its (nonzero) digits is 392000, while the sum is 42.

The spelling of 221557070445 in words is "two hundred twenty-one billion, five hundred fifty-seven million, seventy thousand, four hundred forty-five".