155015352122 has 4 divisors (see below), whose sum is σ = 232523028186. Its totient is φ = 77507676060.

The previous prime is 155015352109. The next prime is 155015352133. The reversal of 155015352122 is 221253510551.

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., 128136077521 + 26879274601 = 357961^2 + 163949^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38753838029 + ... + 38753838032.

Almost surely, 2^155015352122 is an apocalyptic number.

155015352122 is a deficient number, since it is larger than the sum of its proper divisors (77507676064).

155015352122 is an equidigital number, since it uses as much as digits as its factorization.

155015352122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77507676063.

The product of its (nonzero) digits is 15000, while the sum is 32.

Adding to 155015352122 its reverse (221253510551), we get a palindrome (376268862673).

The spelling of 155015352122 in words is "one hundred fifty-five billion, fifteen million, three hundred fifty-two thousand, one hundred twenty-two".