222257421 has 24 divisors (see below), whose sum is σ = 349596000. Its totient is φ = 135529632.

The previous prime is 222257419. The next prime is 222257423. The reversal of 222257421 is 124752222.

It is an interprime number because it is at equal distance from previous prime (222257419) and next prime (222257423).

It is not a de Polignac number, because 222257421 - 2¹ = 222257419 is a prime.

It is a super-2 number, since 2×222257421² = 98796722379142482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222257423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17451 + ... + 27368.

It is an arithmetic number, because the mean of its divisors is an integer number (14566500).

Almost surely, 2^222257421 is an apocalyptic number.

It is an amenable number.

222257421 is a deficient number, since it is larger than the sum of its proper divisors (127338579).

222257421 is a wasteful number, since it uses less digits than its factorization.

222257421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44873 (or 44870 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 222257421 is about 14908.3004061496. The cubic root of 222257421 is about 605.7388428010.

It can be divided in two parts, 22225 and 7421, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 222257421 in words is "two hundred twenty-two million, two hundred fifty-seven thousand, four hundred twenty-one".