155054997 has 6 divisors (see below), whose sum is σ = 223968342. Its totient is φ = 103369992.

The previous prime is 155054969. The next prime is 155055001. The reversal of 155054997 is 799450551.

155054997 is a `hidden beast` number, since 1 + 550 + 5 + 4 + 9 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100280196 + 54774801 = 10014^2 + 7401^2 .

It is not a de Polignac number, because 155054997 - 2¹⁰ = 155053973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155054797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8614158 + ... + 8614175.

It is an arithmetic number, because the mean of its divisors is an integer number (37328057).

Almost surely, 2^155054997 is an apocalyptic number.

It is an amenable number.

155054997 is a deficient number, since it is larger than the sum of its proper divisors (68913345).

155054997 is a wasteful number, since it uses less digits than its factorization.

155054997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17228339 (or 17228336 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The square root of 155054997 is about 12452.1081347698. The cubic root of 155054997 is about 537.2320605795.

It can be divided in two parts, 15505 and 4997, that added together give a palindrome (20502).

The spelling of 155054997 in words is "one hundred fifty-five million, fifty-four thousand, nine hundred ninety-seven".