155225471 has 4 divisors (see below), whose sum is σ = 159420792. Its totient is φ = 151030152.

The previous prime is 155225417. The next prime is 155225479. The reversal of 155225471 is 174522551.

155225471 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 de Polignac number, because none of the positive numbers 2^k-155225471 is a prime.

It is a super-3 number, since 3×155225471³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155225479) 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, 2097605 + ... + 2097678.

It is an arithmetic number, because the mean of its divisors is an integer number (39855198).

Almost surely, 2^155225471 is an apocalyptic number.

155225471 is a deficient number, since it is larger than the sum of its proper divisors (4195321).

155225471 is an equidigital number, since it uses as much as digits as its factorization.

155225471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195320.

The product of its digits is 14000, while the sum is 32.

The square root of 155225471 is about 12458.9514406309. The cubic root of 155225471 is about 537.4288736603.

The spelling of 155225471 in words is "one hundred fifty-five million, two hundred twenty-five thousand, four hundred seventy-one".