155551253 has 32 divisors (see below), whose sum is σ = 191866752. Its totient is φ = 124185600.

The previous prime is 155551243. The next prime is 155551261. The reversal of 155551253 is 352155551.

It is a de Polignac number, because none of the positive numbers 2^k-155551253 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155551223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251801 + ... + 252417.

It is an arithmetic number, because the mean of its divisors is an integer number (5995836).

Almost surely, 2^155551253 is an apocalyptic number.

155551253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155551253 is a deficient number, since it is larger than the sum of its proper divisors (36315499).

155551253 is a wasteful number, since it uses less digits than its factorization.

155551253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 18750, while the sum is 32.

The square root of 155551253 is about 12472.0188021026. The cubic root of 155551253 is about 537.8045901531.

The spelling of 155551253 in words is "one hundred fifty-five million, five hundred fifty-one thousand, two hundred fifty-three".