155266551 has 48 divisors (see below), whose sum is σ = 262604160. Its totient is φ = 90810720.

The previous prime is 155266519. The next prime is 155266561. The reversal of 155266551 is 155662551.

It is not a de Polignac number, because 155266551 - 2⁵ = 155266519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155266511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76516 + ... + 78518.

It is an arithmetic number, because the mean of its divisors is an integer number (5470920).

Almost surely, 2^155266551 is an apocalyptic number.

155266551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155266551 is a deficient number, since it is larger than the sum of its proper divisors (107337609).

155266551 is a wasteful number, since it uses less digits than its factorization.

155266551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2046 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 155266551 is about 12460.5999454280. The cubic root of 155266551 is about 537.4762791767.

The spelling of 155266551 in words is "one hundred fifty-five million, two hundred sixty-six thousand, five hundred fifty-one".