155138301 has 16 divisors (see below), whose sum is σ = 235441920. Its totient is φ = 100902240.

The previous prime is 155138297. The next prime is 155138309. The reversal of 155138301 is 103831551.

It is not a de Polignac number, because 155138301 - 2² = 155138297 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155138309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68965 + ... + 71178.

It is an arithmetic number, because the mean of its divisors is an integer number (14715120).

Almost surely, 2^155138301 is an apocalyptic number.

It is an amenable number.

155138301 is a deficient number, since it is larger than the sum of its proper divisors (80303619).

155138301 is a wasteful number, since it uses less digits than its factorization.

155138301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140193 (or 140187 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 155138301 is about 12455.4526613849. The cubic root of 155138301 is about 537.3282534748.

Adding to 155138301 its reverse (103831551), we get a palindrome (258969852).

The spelling of 155138301 in words is "one hundred fifty-five million, one hundred thirty-eight thousand, three hundred one".