155040551 has 8 divisors (see below), whose sum is σ = 163498800. Its totient is φ = 146612160.

The previous prime is 155040511. The next prime is 155040553.

155040551 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155040551 - 2²⁶ = 87931687 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155040551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155040553) 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 7 ways as a sum of consecutive naturals, for example, 3641 + ... + 17981.

It is an arithmetic number, because the mean of its divisors is an integer number (20437350).

Almost surely, 2^155040551 is an apocalyptic number.

155040551 is a deficient number, since it is larger than the sum of its proper divisors (8458249).

155040551 is a wasteful number, since it uses less digits than its factorization.

155040551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14929.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 155040551 is about 12451.5280588368. The cubic root of 155040551 is about 537.2153759718.

The spelling of 155040551 in words is "one hundred fifty-five million, forty thousand, five hundred fifty-one".