223121025 has 36 divisors (see below), whose sum is σ = 401170380. Its totient is φ = 118540800.

The previous prime is 223121011. The next prime is 223121027. The reversal of 223121025 is 520121322.

It can be written as a sum of positive squares in 6 ways, for example, as 18173169 + 204947856 = 4263^2 + 14316^2 .

It is not a de Polignac number, because 223121025 - 2¹¹ = 223118977 is a prime.

It is a super-3 number, since 3×223121025³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223120989 and 223121007.

It is not an unprimeable number, because it can be changed into a prime (223121027) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 61461 + ... + 64989.

Almost surely, 2^223121025 is an apocalyptic number.

223121025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

223121025 is a deficient number, since it is larger than the sum of its proper divisors (178049355).

223121025 is a wasteful number, since it uses less digits than its factorization.

223121025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826 (or 3818 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 223121025 is about 14937.2361901391. The cubic root of 223121025 is about 606.5223822970.

Adding to 223121025 its reverse (520121322), we get a palindrome (743242347).

The spelling of 223121025 in words is "two hundred twenty-three million, one hundred twenty-one thousand, twenty-five".