155145247 has 16 divisors (see below), whose sum is σ = 168838560. Its totient is φ = 141990912.

The previous prime is 155145229. The next prime is 155145251. The reversal of 155145247 is 742541551.

It is a cyclic number.

It is not a de Polignac number, because 155145247 - 2⁷ = 155145119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155145217) 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, 272379 + ... + 272947.

It is an arithmetic number, because the mean of its divisors is an integer number (10552410).

Almost surely, 2^155145247 is an apocalyptic number.

155145247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

155145247 is a deficient number, since it is larger than the sum of its proper divisors (13693313).

155145247 is a wasteful number, since it uses less digits than its factorization.

155145247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its digits is 28000, while the sum is 34.

The square root of 155145247 is about 12455.7314919679. The cubic root of 155145247 is about 537.3362726128.

Adding to 155145247 its reverse (742541551), we get a palindrome (897686798).

The spelling of 155145247 in words is "one hundred fifty-five million, one hundred forty-five thousand, two hundred forty-seven".