142255531 has 4 divisors (see below), whose sum is σ = 155187864. Its totient is φ = 129323200.

The previous prime is 142255501. The next prime is 142255577. The reversal of 142255531 is 135552241.

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 142255531 - 2¹⁵ = 142222763 is a prime.

It is a super-2 number, since 2×142255531² = 40473272200183922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142255531.

It is not an unprimeable number, because it can be changed into a prime (142255501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6466150 + ... + 6466171.

It is an arithmetic number, because the mean of its divisors is an integer number (38796966).

Almost surely, 2^142255531 is an apocalyptic number.

142255531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

142255531 is a deficient number, since it is larger than the sum of its proper divisors (12932333).

142255531 is a wasteful number, since it uses less digits than its factorization.

142255531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932332.

The product of its digits is 6000, while the sum is 28.

The square root of 142255531 is about 11927.0923112048. The cubic root of 142255531 is about 522.0230988051.

It can be divided in two parts, 1422 and 55531, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 142255531 in words is "one hundred forty-two million, two hundred fifty-five thousand, five hundred thirty-one".