155475451 has 4 divisors (see below), whose sum is σ = 155760232. Its totient is φ = 155190672.

The previous prime is 155475433. The next prime is 155475479. The reversal of 155475451 is 154574551.

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 155475451 - 2⁹ = 155474939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155475451.

It is not an unprimeable number, because it can be changed into a prime (155475751) 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, 141570 + ... + 142663.

It is an arithmetic number, because the mean of its divisors is an integer number (38940058).

Almost surely, 2^155475451 is an apocalyptic number.

155475451 is a deficient number, since it is larger than the sum of its proper divisors (284781).

155475451 is an equidigital number, since it uses as much as digits as its factorization.

155475451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284780.

The product of its digits is 70000, while the sum is 37.

The square root of 155475451 is about 12468.9795492654. The cubic root of 155475451 is about 537.7172164064.

The spelling of 155475451 in words is "one hundred fifty-five million, four hundred seventy-five thousand, four hundred fifty-one".