253555243 has 8 divisors (see below), whose sum is σ = 264738816. Its totient is φ = 242385000.

The previous prime is 253555097. The next prime is 253555277. The reversal of 253555243 is 342555352.

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

It is a cyclic number.

It is not a de Polignac number, because 253555243 - 2⁹ = 253554731 is a prime.

It is a super-2 number, since 2×253555243² = 128580522505578098, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253555199 and 253555208.

It is not an unprimeable number, because it can be changed into a prime (253555543) 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, 73078 + ... + 76468.

It is an arithmetic number, because the mean of its divisors is an integer number (33092352).

Almost surely, 2^253555243 is an apocalyptic number.

253555243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

253555243 is a deficient number, since it is larger than the sum of its proper divisors (11183573).

253555243 is a wasteful number, since it uses less digits than its factorization.

253555243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665.

The product of its digits is 90000, while the sum is 34.

The square root of 253555243 is about 15923.4180689951. The cubic root of 253555243 is about 632.9326970946.

The spelling of 253555243 in words is "two hundred fifty-three million, five hundred fifty-five thousand, two hundred forty-three".