242553021 has 8 divisors (see below), whose sum is σ = 333836544. Its totient is φ = 156485760.

The previous prime is 242552987. The next prime is 242553023. The reversal of 242553021 is 120355242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 242553021 - 2¹³ = 242544829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242552982 and 242553000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242553023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1303956 + ... + 1304141.

It is an arithmetic number, because the mean of its divisors is an integer number (41729568).

Almost surely, 2^242553021 is an apocalyptic number.

It is an amenable number.

242553021 is a deficient number, since it is larger than the sum of its proper divisors (91283523).

242553021 is a wasteful number, since it uses less digits than its factorization.

242553021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608131.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 242553021 is about 15574.1138110648. The cubic root of 242553021 is about 623.6422973520.

The spelling of 242553021 in words is "two hundred forty-two million, five hundred fifty-three thousand, twenty-one".