142210531 has 4 divisors (see below), whose sum is σ = 142531992. Its totient is φ = 141889072.

The previous prime is 142210529. The next prime is 142210543. The reversal of 142210531 is 135012241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142210531 - 2¹ = 142210529 is a prime.

It is a super-2 number, since 2×142210531² = 40447670254603922, 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 = 142210499 and 142210508.

It is not an unprimeable number, because it can be changed into a prime (142210571) 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 3 ways as a sum of consecutive naturals, for example, 160066 + ... + 160951.

It is an arithmetic number, because the mean of its divisors is an integer number (35632998).

Almost surely, 2^142210531 is an apocalyptic number.

142210531 is a deficient number, since it is larger than the sum of its proper divisors (321461).

142210531 is an equidigital number, since it uses as much as digits as its factorization.

142210531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321460.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 142210531 is about 11925.2057005320. The cubic root of 142210531 is about 521.9680487678.

Adding to 142210531 its reverse (135012241), we get a palindrome (277222772).

The spelling of 142210531 in words is "one hundred forty-two million, two hundred ten thousand, five hundred thirty-one".