155440451 has 8 divisors (see below), whose sum is σ = 156427200. Its totient is φ = 154457280.

The previous prime is 155440429. The next prime is 155440459. The reversal of 155440451 is 154044551.

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

It is a cyclic number.

It is not a de Polignac number, because 155440451 - 2¹⁸ = 155178307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155440459) 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 7 ways as a sum of consecutive naturals, for example, 191735 + ... + 192543.

It is an arithmetic number, because the mean of its divisors is an integer number (19553400).

Almost surely, 2^155440451 is an apocalyptic number.

155440451 is a deficient number, since it is larger than the sum of its proper divisors (986749).

155440451 is an equidigital number, since it uses as much as digits as its factorization.

155440451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 155440451 is about 12467.5759873361. The cubic root of 155440451 is about 537.6768638087.

The spelling of 155440451 in words is "one hundred fifty-five million, four hundred forty thousand, four hundred fifty-one".