21250641434531 has 8 divisors (see below), whose sum is σ = 22561002709344. Its totient is φ = 19946982775680.

The previous prime is 21250641434507. The next prime is 21250641434591. The reversal of 21250641434531 is 13543414605212.

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

It is a cyclic number.

It is not a de Polignac number, because 21250641434531 - 2¹⁴ = 21250641418147 is a prime.

It is a super-2 number, since 2×21250641434531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21250641434501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1675647455 + ... + 1675660136.

It is an arithmetic number, because the mean of its divisors is an integer number (2820125338668).

Almost surely, 2^{21250641434531} is an apocalyptic number.

21250641434531 is a deficient number, since it is larger than the sum of its proper divisors (1310361274813).

21250641434531 is a wasteful number, since it uses less digits than its factorization.

21250641434531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351307981.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 21250641434531 in words is "twenty-one trillion, two hundred fifty billion, six hundred forty-one million, four hundred thirty-four thousand, five hundred thirty-one".