155121353 has 8 divisors (see below), whose sum is σ = 161927880. Its totient is φ = 148452480.

The previous prime is 155121347. The next prime is 155121389. The reversal of 155121353 is 353121551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21418384 + 133702969 = 4628^2 + 11563^2 .

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 155121353 - 2¹⁴ = 155104969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155121053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32108 + ... + 36621.

It is an arithmetic number, because the mean of its divisors is an integer number (20240985).

Almost surely, 2^155121353 is an apocalyptic number.

It is an amenable number.

155121353 is a deficient number, since it is larger than the sum of its proper divisors (6806527).

155121353 is an equidigital number, since it uses as much as digits as its factorization.

155121353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68827.

The product of its digits is 2250, while the sum is 26.

The square root of 155121353 is about 12454.7722981996. The cubic root of 155121353 is about 537.3086860505.

The spelling of 155121353 in words is "one hundred fifty-five million, one hundred twenty-one thousand, three hundred fifty-three".