155414551 has 4 divisors (see below), whose sum is σ = 155543472. Its totient is φ = 155285632.

The previous prime is 155414533. The next prime is 155414557.

155414551 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155414551 - 2²³ = 147025943 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155414557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62635 + ... + 65068.

It is an arithmetic number, because the mean of its divisors is an integer number (38885868).

Almost surely, 2^155414551 is an apocalyptic number.

155414551 is a deficient number, since it is larger than the sum of its proper divisors (128921).

155414551 is a wasteful number, since it uses less digits than its factorization.

155414551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128920.

The product of its digits is 10000, while the sum is 31.

The square root of 155414551 is about 12466.5372497739. The cubic root of 155414551 is about 537.6469989865.

Adding to 155414551 its product of digits (10000), we get a palindrome (155424551).

Subtracting from 155414551 its product of digits (10000), we obtain a palindrome (155404551).

The spelling of 155414551 in words is "one hundred fifty-five million, four hundred fourteen thousand, five hundred fifty-one".