243153651 has 12 divisors (see below), whose sum is σ = 351062808. Its totient is φ = 149632704.

The previous prime is 243153649. The next prime is 243153707. The reversal of 243153651 is 156351342.

It is not a de Polignac number, because 243153651 - 2¹ = 243153649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243153641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239290 + ... + 240303.

It is an arithmetic number, because the mean of its divisors is an integer number (29255234).

Almost surely, 2^243153651 is an apocalyptic number.

243153651 is a deficient number, since it is larger than the sum of its proper divisors (107909157).

243153651 is a wasteful number, since it uses less digits than its factorization.

243153651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479622 (or 479609 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 243153651 is about 15593.3848474281. The cubic root of 243153651 is about 624.1566447015.

It can be divided in two parts, 24315 and 3651, that added together give a triangular number (27966 = T₂₃₆).

The spelling of 243153651 in words is "two hundred forty-three million, one hundred fifty-three thousand, six hundred fifty-one".