22531002 has 48 divisors (see below), whose sum is σ = 50111712. Its totient is φ = 6713280.

The previous prime is 22530997. The next prime is 22531009. The reversal of 22531002 is 20013522.

It is a super-2 number, since 2×22531002² = 1015292102248008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22531009) 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, 106677 + ... + 106887.

It is an arithmetic number, because the mean of its divisors is an integer number (1043994).

Almost surely, 2^22531002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22531002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25055856).

22531002 is an abundant number, since it is smaller than the sum of its proper divisors (27580710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22531002 is a wasteful number, since it uses less digits than its factorization.

22531002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 22531002 is about 4746.6832630796. The cubic root of 22531002 is about 282.4404113751.

Adding to 22531002 its reverse (20013522), we get a palindrome (42544524).

The spelling of 22531002 in words is "twenty-two million, five hundred thirty-one thousand, two".