155240122 has 4 divisors (see below), whose sum is σ = 232860186. Its totient is φ = 77620060.

The previous prime is 155240117. The next prime is 155240143. The reversal of 155240122 is 221042551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125417601 + 29822521 = 11199^2 + 5461^2 .

It is a junction number, because it is equal to n+sod(n) for n = 155240093 and 155240102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38810029 + ... + 38810032.

Almost surely, 2^155240122 is an apocalyptic number.

155240122 is a deficient number, since it is larger than the sum of its proper divisors (77620064).

155240122 is an equidigital number, since it uses as much as digits as its factorization.

155240122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77620063.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 155240122 is about 12459.5393975861. The cubic root of 155240122 is about 537.4457815872.

Adding to 155240122 its reverse (221042551), we get a palindrome (376282673).

The spelling of 155240122 in words is "one hundred fifty-five million, two hundred forty thousand, one hundred twenty-two".