21531341302 has 8 divisors (see below), whose sum is σ = 33701229936. Its totient is φ = 10297597992.

The previous prime is 21531341263. The next prime is 21531341339. The reversal of 21531341302 is 20314313512.

It is a happy number.

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

It is a super-2 number, since 2×21531341302² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234036273 + ... + 234036364.

It is an arithmetic number, because the mean of its divisors is an integer number (4212653742).

Almost surely, 2^21531341302 is an apocalyptic number.

21531341302 is a deficient number, since it is larger than the sum of its proper divisors (12169888634).

21531341302 is a wasteful number, since it uses less digits than its factorization.

21531341302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468072662.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 21531341302 its reverse (20314313512), we get a palindrome (41845654814).

The spelling of 21531341302 in words is "twenty-one billion, five hundred thirty-one million, three hundred forty-one thousand, three hundred two".