193152421 has 24 divisors (see below), whose sum is σ = 243656000. Its totient is φ = 149878080.

The previous prime is 193152403. The next prime is 193152437. The reversal of 193152421 is 124251391.

It is not a de Polignac number, because 193152421 - 2⁵ = 193152389 is a prime.

It is a super-3 number, since 3×193152421³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 193152421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193152121) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 386830 + ... + 387328.

Almost surely, 2^193152421 is an apocalyptic number.

193152421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

193152421 is a deficient number, since it is larger than the sum of its proper divisors (50503579).

193152421 is a wasteful number, since it uses less digits than its factorization.

193152421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985 (or 974 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 193152421 is about 13897.9286586167. The cubic root of 193152421 is about 578.0517478204.

It can be divided in two parts, 19315 and 2421, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 193152421 in words is "one hundred ninety-three million, one hundred fifty-two thousand, four hundred twenty-one".