21157143445522 has 8 divisors (see below), whose sum is σ = 36269388763776. Its totient is φ = 9067347190932.

The previous prime is 21157143445441. The next prime is 21157143445531. The reversal of 21157143445522 is 22554434175112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 755612265898 + ... + 755612265925.

It is an arithmetic number, because the mean of its divisors is an integer number (4533673595472).

Almost surely, 2^{21157143445522} is an apocalyptic number.

21157143445522 is a deficient number, since it is larger than the sum of its proper divisors (15112245318254).

21157143445522 is a wasteful number, since it uses less digits than its factorization.

21157143445522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511224531832.

The product of its digits is 1344000, while the sum is 46.

The spelling of 21157143445522 in words is "twenty-one trillion, one hundred fifty-seven billion, one hundred forty-three million, four hundred forty-five thousand, five hundred twenty-two".