155551451 has 4 divisors (see below), whose sum is σ = 169692504. Its totient is φ = 141410400.

The previous prime is 155551433. The next prime is 155551453. The reversal of 155551451 is 154155551.

155551451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 155551451 - 2⁶ = 155551387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155551453) 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, 7070510 + ... + 7070531.

It is an arithmetic number, because the mean of its divisors is an integer number (42423126).

Almost surely, 2^155551451 is an apocalyptic number.

155551451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155551451 is a deficient number, since it is larger than the sum of its proper divisors (14141053).

155551451 is a wasteful number, since it uses less digits than its factorization.

155551451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14141052.

The product of its digits is 12500, while the sum is 32.

The square root of 155551451 is about 12472.0267398687. The cubic root of 155551451 is about 537.8048183422.

The spelling of 155551451 in words is "one hundred fifty-five million, five hundred fifty-one thousand, four hundred fifty-one".