155454331 has 4 divisors (see below), whose sum is σ = 159069592. Its totient is φ = 151839072.

The previous prime is 155454323. The next prime is 155454337. The reversal of 155454331 is 133454551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133454551 = 373 ⋅357787.

It is a cyclic number.

It is not a de Polignac number, because 155454331 - 2³ = 155454323 is a prime.

It is a super-2 number, since 2×155454331² = 48332098053315122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155454293 and 155454302.

It is not an unprimeable number, because it can be changed into a prime (155454337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1807566 + ... + 1807651.

It is an arithmetic number, because the mean of its divisors is an integer number (39767398).

Almost surely, 2^155454331 is an apocalyptic number.

155454331 is a deficient number, since it is larger than the sum of its proper divisors (3615261).

155454331 is an equidigital number, since it uses as much as digits as its factorization.

155454331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3615260.

The product of its digits is 18000, while the sum is 31.

The square root of 155454331 is about 12468.1326188006. The cubic root of 155454331 is about 537.6928672207.

The spelling of 155454331 in words is "one hundred fifty-five million, four hundred fifty-four thousand, three hundred thirty-one".