142353531 has 24 divisors (see below), whose sum is σ = 213857280. Its totient is φ = 94626792.

The previous prime is 142353503. The next prime is 142353551. The reversal of 142353531 is 135353241.

142353531 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 142353531 - 2¹⁴ = 142337147 is a prime.

It is a super-2 number, since 2×142353531² = 40529055576335922, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 142353495 and 142353504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142353551) 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, 115786 + ... + 117008.

It is an arithmetic number, because the mean of its divisors is an integer number (8910720).

Almost surely, 2^142353531 is an apocalyptic number.

142353531 is a deficient number, since it is larger than the sum of its proper divisors (71503749).

142353531 is an equidigital number, since it uses as much as digits as its factorization.

142353531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717 (or 1705 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 142353531 is about 11931.1998977471. The cubic root of 142353531 is about 522.1429453942.

It can be divided in two parts, 142353 and 531, that added together give a square (142884 = 378²).

The spelling of 142353531 in words is "one hundred forty-two million, three hundred fifty-three thousand, five hundred thirty-one".