155104551 has 30 divisors (see below), whose sum is σ = 269534760. Its totient is φ = 88628904.

The previous prime is 155104471. The next prime is 155104637. The reversal of 155104551 is 155401551.

155104551 is a `hidden beast` number, since 1 + 5 + 5 + 104 + 551 = 666.

It is not a de Polignac number, because 155104551 - 2¹¹ = 155102503 is a prime.

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 (155104051) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 15571 + ... + 23508.

It is an arithmetic number, because the mean of its divisors is an integer number (8984492).

Almost surely, 2^155104551 is an apocalyptic number.

155104551 is a deficient number, since it is larger than the sum of its proper divisors (114430209).

155104551 is an equidigital number, since it uses as much as digits as its factorization.

155104551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39105 (or 39089 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 27.

The square root of 155104551 is about 12454.0977593722. The cubic root of 155104551 is about 537.2892857846.

The spelling of 155104551 in words is "one hundred fifty-five million, one hundred four thousand, five hundred fifty-one".