155235249 has 12 divisors (see below), whose sum is σ = 241477236. Its totient is φ = 95529312.

The previous prime is 155235247. The next prime is 155235253. The reversal of 155235249 is 942532551.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16160400 + 139074849 = 4020^2 + 11793^2 .

It is not a de Polignac number, because 155235249 - 2¹ = 155235247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155235247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663282 + ... + 663515.

It is an arithmetic number, because the mean of its divisors is an integer number (20123103).

Almost surely, 2^155235249 is an apocalyptic number.

It is an amenable number.

155235249 is a deficient number, since it is larger than the sum of its proper divisors (86241987).

155235249 is a wasteful number, since it uses less digits than its factorization.

155235249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326816 (or 1326813 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 155235249 is about 12459.3438430762. The cubic root of 155235249 is about 537.4401580395.

The spelling of 155235249 in words is "one hundred fifty-five million, two hundred thirty-five thousand, two hundred forty-nine".