21752298 has 12 divisors (see below), whose sum is σ = 47130018. Its totient is φ = 7250760.

The previous prime is 21752293. The next prime is 21752303. The reversal of 21752298 is 89225712.

It is an interprime number because it is at equal distance from previous prime (21752293) and next prime (21752303).

It can be written as a sum of positive squares in only one way, i.e., 20766249 + 986049 = 4557^2 + 993^2 .

It is not an unprimeable number, because it can be changed into a prime (21752293) 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, 604213 + ... + 604248.

Almost surely, 2^21752298 is an apocalyptic number.

21752298 is an abundant number, since it is smaller than the sum of its proper divisors (25377720).

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

21752298 is a wasteful number, since it uses less digits than its factorization.

21752298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208469 (or 1208466 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 21752298 is about 4663.9358914977. The cubic root of 21752298 is about 279.1483390458.

The spelling of 21752298 in words is "twenty-one million, seven hundred fifty-two thousand, two hundred ninety-eight".