142154430221893 has 2 divisors, whose sum is σ = 142154430221894. Its totient is φ = 142154430221892.

The previous prime is 142154430221863. The next prime is 142154430222019. The reversal of 142154430221893 is 398122034451241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126091384237764 + 16063045984129 = 11229042^2 + 4007873^2 .

It is a cyclic number.

It is not a de Polignac number, because 142154430221893 - 2¹⁷ = 142154430090821 is a prime.

It is a super-2 number, since 2×142154430221893² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142154430221863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71077215110946 + 71077215110947.

It is an arithmetic number, because the mean of its divisors is an integer number (71077215110947).

Almost surely, 2^{142154430221893} is an apocalyptic number.

It is an amenable number.

142154430221893 is a deficient number, since it is larger than the sum of its proper divisors (1).

142154430221893 is an equidigital number, since it uses as much as digits as its factorization.

142154430221893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 142154430221893 in words is "one hundred forty-two trillion, one hundred fifty-four billion, four hundred thirty million, two hundred twenty-one thousand, eight hundred ninety-three".