142436387531 has 2 divisors, whose sum is σ = 142436387532. Its totient is φ = 142436387530.

The previous prime is 142436387497. The next prime is 142436387551. The reversal of 142436387531 is 135783634241.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142436387531 - 2³⁰ = 141362645707 is a prime.

It is a super-2 number, since 2×142436387531² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (142436387551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71218193765 + 71218193766.

It is an arithmetic number, because the mean of its divisors is an integer number (71218193766).

Almost surely, 2^142436387531 is an apocalyptic number.

142436387531 is a deficient number, since it is larger than the sum of its proper divisors (1).

142436387531 is an equidigital number, since it uses as much as digits as its factorization.

142436387531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 47.

The spelling of 142436387531 in words is "one hundred forty-two billion, four hundred thirty-six million, three hundred eighty-seven thousand, five hundred thirty-one".