22402513 has 4 divisors (see below), whose sum is σ = 25602880. Its totient is φ = 19202148.

The previous prime is 22402469. The next prime is 22402519. The reversal of 22402513 is 31520422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31520422 = 2 ⋅15760211.

It is a de Polignac number, because none of the positive numbers 2^k-22402513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22402519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600173 + ... + 1600186.

It is an arithmetic number, because the mean of its divisors is an integer number (6400720).

Almost surely, 2^22402513 is an apocalyptic number.

It is an amenable number.

22402513 is a deficient number, since it is larger than the sum of its proper divisors (3200367).

22402513 is an equidigital number, since it uses as much as digits as its factorization.

22402513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200366.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22402513 is about 4733.1293031144. The cubic root of 22402513 is about 281.9024904728.

Adding to 22402513 its reverse (31520422), we get a palindrome (53922935).

It can be divided in two parts, 2240 and 2513, that added together give a triangular number (4753 = T₉₇).

The spelling of 22402513 in words is "twenty-two million, four hundred two thousand, five hundred thirteen".