22781502 has 12 divisors (see below), whose sum is σ = 49359960. Its totient is φ = 7593828.

The previous prime is 22781483. The next prime is 22781503. The reversal of 22781502 is 20518722.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22781503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 632802 + ... + 632837.

It is an arithmetic number, because the mean of its divisors is an integer number (4113330).

Almost surely, 2^22781502 is an apocalyptic number.

22781502 is an abundant number, since it is smaller than the sum of its proper divisors (26578458).

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

22781502 is a wasteful number, since it uses less digits than its factorization.

22781502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265647 (or 1265644 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 22781502 is about 4772.9971715894. The cubic root of 22781502 is about 283.4832814903.

Adding to 22781502 its sum of digits (27), we get a square (22781529 = 4773²).

The spelling of 22781502 in words is "twenty-two million, seven hundred eighty-one thousand, five hundred two".