21317501151 has 6 divisors (see below), whose sum is σ = 30791946120. Its totient is φ = 14211667428.

The previous prime is 21317501147. The next prime is 21317501201. The reversal of 21317501151 is 15110571312.

21317501151 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 7 + 501 + 151 = 666.

It is not a de Polignac number, because 21317501151 - 2² = 21317501147 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21317501131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1184305611 + ... + 1184305628.

It is an arithmetic number, because the mean of its divisors is an integer number (5131991020).

Almost surely, 2^21317501151 is an apocalyptic number.

21317501151 is a deficient number, since it is larger than the sum of its proper divisors (9474444969).

21317501151 is a wasteful number, since it uses less digits than its factorization.

21317501151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368611245 (or 2368611242 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

The spelling of 21317501151 in words is "twenty-one billion, three hundred seventeen million, five hundred one thousand, one hundred fifty-one".