142144551 has 24 divisors (see below), whose sum is σ = 213507840. Its totient is φ = 94503672.

The previous prime is 142144547. The next prime is 142144553. The reversal of 142144551 is 155441241.

142144551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 142144551 - 2² = 142144547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142144553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136290 + ... + 137328.

It is an arithmetic number, because the mean of its divisors is an integer number (8896160).

Almost surely, 2^142144551 is an apocalyptic number.

142144551 is a deficient number, since it is larger than the sum of its proper divisors (71363289).

142144551 is an equidigital number, since it uses as much as digits as its factorization.

142144551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617 (or 1605 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 142144551 is about 11922.4389702779. The cubic root of 142144551 is about 521.8873121792.

Adding to 142144551 its reverse (155441241), we get a palindrome (297585792).

The spelling of 142144551 in words is "one hundred forty-two million, one hundred forty-four thousand, five hundred fifty-one".