21315224150 has 24 divisors (see below), whose sum is σ = 43250528664. Its totient is φ = 7750990400.

The previous prime is 21315224149. The next prime is 21315224201. The reversal of 21315224150 is 5142251312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19376927 + ... + 19378026.

It is an arithmetic number, because the mean of its divisors is an integer number (1802105361).

Almost surely, 2^21315224150 is an apocalyptic number.

21315224150 is an abundant number, since it is smaller than the sum of its proper divisors (21935304514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21315224150 is a wasteful number, since it uses less digits than its factorization.

21315224150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38754976 (or 38754971 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 21315224150 its reverse (5142251312), we get a palindrome (26457475462).

The spelling of 21315224150 in words is "twenty-one billion, three hundred fifteen million, two hundred twenty-four thousand, one hundred fifty".