155603253 has 16 divisors (see below), whose sum is σ = 227096576. Its totient is φ = 94184640.

The previous prime is 155603251. The next prime is 155603263. The reversal of 155603253 is 352306551.

It is not a de Polignac number, because 155603253 - 2¹ = 155603251 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 155603253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155603251) 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, 30325 + ... + 35082.

It is an arithmetic number, because the mean of its divisors is an integer number (14193536).

Almost surely, 2^155603253 is an apocalyptic number.

155603253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155603253 is a deficient number, since it is larger than the sum of its proper divisors (71493323).

155603253 is a wasteful number, since it uses less digits than its factorization.

155603253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65484.

The product of its (nonzero) digits is 13500, while the sum is 30.

The square root of 155603253 is about 12474.1032944256. The cubic root of 155603253 is about 537.8645119312.

The spelling of 155603253 in words is "one hundred fifty-five million, six hundred three thousand, two hundred fifty-three".