21214050156531 has 8 divisors (see below), whose sum is σ = 31428222454160. Its totient is φ = 14142700104336.

The previous prime is 21214050156527. The next prime is 21214050156547. The reversal of 21214050156531 is 13565105041212.

21214050156531 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 40 + 50 + 1 + 565 + 3 + 1 = 666.

It is not a de Polignac number, because 21214050156531 - 2² = 21214050156527 is a prime.

It is a super-2 number, since 2×21214050156531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214050156511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392852780650 + ... + 392852780703.

It is an arithmetic number, because the mean of its divisors is an integer number (3928527806770).

Almost surely, 2^{21214050156531} is an apocalyptic number.

21214050156531 is a deficient number, since it is larger than the sum of its proper divisors (10214172297629).

21214050156531 is an equidigital number, since it uses as much as digits as its factorization.

21214050156531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785705561362 (or 785705561356 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

Adding to 21214050156531 its reverse (13565105041212), we get a palindrome (34779155197743).

The spelling of 21214050156531 in words is "twenty-one trillion, two hundred fourteen billion, fifty million, one hundred fifty-six thousand, five hundred thirty-one".