21010532315 has 16 divisors (see below), whose sum is σ = 26315143488. Its totient is φ = 16073773056.

The previous prime is 21010532267. The next prime is 21010532363. The reversal of 21010532315 is 51323501012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21010532267) and next prime (21010532363).

It is a cyclic number.

It is not a de Polignac number, because 21010532315 - 2¹² = 21010528219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517847 + ... + 556943.

It is an arithmetic number, because the mean of its divisors is an integer number (1644696468).

Almost surely, 2^21010532315 is an apocalyptic number.

21010532315 is a deficient number, since it is larger than the sum of its proper divisors (5304611173).

21010532315 is a wasteful number, since it uses less digits than its factorization.

21010532315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43798.

The product of its (nonzero) digits is 900, while the sum is 23.

The spelling of 21010532315 in words is "twenty-one billion, ten million, five hundred thirty-two thousand, three hundred fifteen".