135331551242 has 4 divisors (see below), whose sum is σ = 202997326866. Its totient is φ = 67665775620.

The previous prime is 135331551227. The next prime is 135331551259. The reversal of 135331551242 is 242155133531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242155133531 = 151 ⋅1603676381.

It can be written as a sum of positive squares in only one way, i.e., 80246991841 + 55084559401 = 283279^2 + 234701^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33832887809 + ... + 33832887812.

Almost surely, 2^135331551242 is an apocalyptic number.

135331551242 is a deficient number, since it is larger than the sum of its proper divisors (67665775624).

135331551242 is an equidigital number, since it uses as much as digits as its factorization.

135331551242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67665775623.

The product of its digits is 54000, while the sum is 35.

Adding to 135331551242 its reverse (242155133531), we get a palindrome (377486684773).

The spelling of 135331551242 in words is "one hundred thirty-five billion, three hundred thirty-one million, five hundred fifty-one thousand, two hundred forty-two".