223487835025 has 81 divisors (see below), whose sum is σ = 349411285521. Its totient is φ = 141324281280.

The previous prime is 223487835019. The next prime is 223487835073. The reversal of 223487835025 is 520538784322.

The square root of 223487835025 is 472745.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 57604320081 + 165883514944 = 240009^2 + 407288^2 .

It is not a de Polignac number, because 223487835025 - 2⁷ = 223487834897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223487835025.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 215098456 + ... + 215099494.

Almost surely, 2^223487835025 is an apocalyptic number.

223487835025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

223487835025 is the 472745-th square number.

223487835025 is the 236373-rd centered octagonal number.

It is an amenable number.

223487835025 is a deficient number, since it is larger than the sum of its proper divisors (125923450496).

223487835025 is an equidigital number, since it uses as much as digits as its factorization.

223487835025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 49.

Multiplying 223487835025 by its sum of digits (49), we get a square (10950903916225 = 3309215²).

223487835025 divided by its sum of digits (49) gives a square (4560976225 = 67535²).

The spelling of 223487835025 in words is "two hundred twenty-three billion, four hundred eighty-seven million, eight hundred thirty-five thousand, twenty-five".