22001531535 has 24 divisors (see below), whose sum is σ = 38203055280. Its totient is φ = 11713514112.

The previous prime is 22001531533. The next prime is 22001531537. The reversal of 22001531535 is 53513510022.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22001531533) and next prime (22001531537).

It is not a de Polignac number, because 22001531535 - 2¹ = 22001531533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22001531499 and 22001531508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001531533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404029 + ... + 455238.

It is an arithmetic number, because the mean of its divisors is an integer number (1591793970).

Almost surely, 2^22001531535 is an apocalyptic number.

22001531535 is a deficient number, since it is larger than the sum of its proper divisors (16201523745).

22001531535 is a wasteful number, since it uses less digits than its factorization.

22001531535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859847 (or 859844 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

It can be divided in two parts, 22001 and 531535, that added together give a square (553536 = 744²).

The spelling of 22001531535 in words is "twenty-two billion, one million, five hundred thirty-one thousand, five hundred thirty-five".