224121540 has 48 divisors (see below), whose sum is σ = 664457472. Its totient is φ = 56249856.

The previous prime is 224121529. The next prime is 224121551. The reversal of 224121540 is 45121422.

It is an interprime number because it is at equal distance from previous prime (224121529) and next prime (224121551).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108844 + ... + 110883.

It is an arithmetic number, because the mean of its divisors is an integer number (13842864).

Almost surely, 2^224121540 is an apocalyptic number.

224121540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

224121540 is an abundant number, since it is smaller than the sum of its proper divisors (440335932).

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

224121540 is a wasteful number, since it uses less digits than its factorization.

224121540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219756 (or 219754 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 224121540 is about 14970.6893628851. The cubic root of 224121540 is about 607.4276158910.

Adding to 224121540 its reverse (45121422), we get a palindrome (269242962).

The spelling of 224121540 in words is "two hundred twenty-four million, one hundred twenty-one thousand, five hundred forty".