234421520 has 40 divisors (see below), whose sum is σ = 568731456. Its totient is φ = 89691008.

The previous prime is 234421501. The next prime is 234421531. The reversal of 234421520 is 25124432.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×234421520² = 109906898078220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61862 + ... + 65541.

Almost surely, 2^234421520 is an apocalyptic number.

234421520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

234421520 is an abundant number, since it is smaller than the sum of its proper divisors (334309936).

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

234421520 is a wasteful number, since it uses less digits than its factorization.

234421520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127439 (or 127433 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 234421520 is about 15310.8301538486. The cubic root of 234421520 is about 616.5938081278.

Adding to 234421520 its reverse (25124432), we get a palindrome (259545952).

The spelling of 234421520 in words is "two hundred thirty-four million, four hundred twenty-one thousand, five hundred twenty".