205215355331445 has 32 divisors (see below), whose sum is σ = 347660514167040. Its totient is φ = 103009598714880.

The previous prime is 205215355331429. The next prime is 205215355331551. The reversal of 205215355331445 is 544133553512502.

It is not a de Polignac number, because 205215355331445 - 2⁴ = 205215355331429 is a prime.

It is a super-2 number, since 2×205215355331445² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205215355331394 and 205215355331403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59198235 + ... + 62568855.

It is an arithmetic number, because the mean of its divisors is an integer number (10864391067720).

Almost surely, 2^{205215355331445} is an apocalyptic number.

It is an amenable number.

205215355331445 is a deficient number, since it is larger than the sum of its proper divisors (142445158835595).

205215355331445 is a wasteful number, since it uses less digits than its factorization.

205215355331445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609405.

The product of its (nonzero) digits is 5400000, while the sum is 48.

The spelling of 205215355331445 in words is "two hundred five trillion, two hundred fifteen billion, three hundred fifty-five million, three hundred thirty-one thousand, four hundred forty-five".