155520253 has 16 divisors (see below), whose sum is σ = 180069120. Its totient is φ = 131567616.

The previous prime is 155520251. The next prime is 155520259. The reversal of 155520253 is 352025551.

155520253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 155520253 - 2¹ = 155520251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155520251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201853 + ... + 202621.

It is an arithmetic number, because the mean of its divisors is an integer number (11254320).

Almost surely, 2^155520253 is an apocalyptic number.

It is an amenable number.

155520253 is a deficient number, since it is larger than the sum of its proper divisors (24548867).

155520253 is a wasteful number, since it uses less digits than its factorization.

155520253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 155520253 is about 12470.7759582153. The cubic root of 155520253 is about 537.7688612007.

The spelling of 155520253 in words is "one hundred fifty-five million, five hundred twenty thousand, two hundred fifty-three".