253220142 has 24 divisors (see below), whose sum is σ = 589125096. Its totient is φ = 72348528.

The previous prime is 253220131. The next prime is 253220147. The reversal of 253220142 is 241022352.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253220147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 430353 + ... + 430940.

It is an arithmetic number, because the mean of its divisors is an integer number (24546879).

Almost surely, 2^253220142 is an apocalyptic number.

253220142 is an abundant number, since it is smaller than the sum of its proper divisors (335904954).

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

253220142 is a wasteful number, since it uses less digits than its factorization.

253220142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861312 (or 861305 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 253220142 is about 15912.8923203797. The cubic root of 253220142 is about 632.6537442294.

Adding to 253220142 its reverse (241022352), we get a palindrome (494242494).

The spelling of 253220142 in words is "two hundred fifty-three million, two hundred twenty thousand, one hundred forty-two".