155425281 has 8 divisors (see below), whose sum is σ = 226073184. Its totient is φ = 94197120.

The previous prime is 155425279. The next prime is 155425307. The reversal of 155425281 is 182524551.

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

It is not a de Polignac number, because 155425281 - 2¹ = 155425279 is a prime.

It is a super-2 number, since 2×155425281² = 48314035947857922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 4709857 = 155425281 / (1 + 5 + 5 + 4 + 2 + 5 + 2 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (155425261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2354896 + ... + 2354961.

It is an arithmetic number, because the mean of its divisors is an integer number (28259148).

Almost surely, 2^155425281 is an apocalyptic number.

155425281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

155425281 is a deficient number, since it is larger than the sum of its proper divisors (70647903).

155425281 is a wasteful number, since it uses less digits than its factorization.

155425281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4709871.

The product of its digits is 16000, while the sum is 33.

The square root of 155425281 is about 12466.9675944072. The cubic root of 155425281 is about 537.6593719582.

The spelling of 155425281 in words is "one hundred fifty-five million, four hundred twenty-five thousand, two hundred eighty-one".