155235442 has 8 divisors (see below), whose sum is σ = 232907436. Its totient is φ = 77599632.

The previous prime is 155235439. The next prime is 155235467. The reversal of 155235442 is 244532551.

It can be written as a sum of positive squares in 2 ways, for example, as 153983281 + 1252161 = 12409^2 + 1119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8448 + ... + 19540.

Almost surely, 2^155235442 is an apocalyptic number.

155235442 is a deficient number, since it is larger than the sum of its proper divisors (77671994).

155235442 is a wasteful number, since it uses less digits than its factorization.

155235442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18092.

The product of its digits is 24000, while the sum is 31.

The square root of 155235442 is about 12459.3515882649. The cubic root of 155235442 is about 537.4403807679.

Adding to 155235442 its reverse (244532551), we get a palindrome (399767993).

The spelling of 155235442 in words is "one hundred fifty-five million, two hundred thirty-five thousand, four hundred forty-two".