230121540 has 192 divisors, whose sum is σ = 822528000. Its totient is φ = 52824960.

The previous prime is 230121523. The next prime is 230121613. The reversal of 230121540 is 45121032.

230121540 is a `hidden beast` number, since 2 + 3 + 0 + 121 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111841 + ... + 113879.

It is an arithmetic number, because the mean of its divisors is an integer number (4284000).

Almost surely, 2^230121540 is an apocalyptic number.

230121540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 230121540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411264000).

230121540 is an abundant number, since it is smaller than the sum of its proper divisors (592406460).

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

230121540 is a wasteful number, since it uses less digits than its factorization.

230121540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087 (or 2079 counting only the distinct ones).

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

The square root of 230121540 is about 15169.7574140129. The cubic root of 230121540 is about 612.8004712063.

Adding to 230121540 its reverse (45121032), we get a palindrome (275242572).

The spelling of 230121540 in words is "two hundred thirty million, one hundred twenty-one thousand, five hundred forty".