135223134542 has 4 divisors (see below), whose sum is σ = 202834701816. Its totient is φ = 67611567270.

The previous prime is 135223134533. The next prime is 135223134547. The reversal of 135223134542 is 245431322531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 245431322531 = 359 ⋅683652709.

It is a super-2 number, since 2×135223134542² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135223134547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33805783634 + ... + 33805783637.

It is an arithmetic number, because the mean of its divisors is an integer number (50708675454).

Almost surely, 2^135223134542 is an apocalyptic number.

135223134542 is a deficient number, since it is larger than the sum of its proper divisors (67611567274).

135223134542 is an equidigital number, since it uses as much as digits as its factorization.

135223134542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67611567273.

The product of its digits is 86400, while the sum is 35.

The spelling of 135223134542 in words is "one hundred thirty-five billion, two hundred twenty-three million, one hundred thirty-four thousand, five hundred forty-two".