155143397 has 4 divisors (see below), whose sum is σ = 155184876. Its totient is φ = 155101920.

The previous prime is 155143369. The next prime is 155143403. The reversal of 155143397 is 793341551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102232321 + 52911076 = 10111^2 + 7274^2 .

It is a cyclic number.

It is not a de Polignac number, because 155143397 - 2⁸ = 155143141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155143397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155143337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14504 + ... + 22817.

It is an arithmetic number, because the mean of its divisors is an integer number (38796219).

Almost surely, 2^155143397 is an apocalyptic number.

It is an amenable number.

155143397 is a deficient number, since it is larger than the sum of its proper divisors (41479).

155143397 is an equidigital number, since it uses as much as digits as its factorization.

155143397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41478.

The product of its digits is 56700, while the sum is 38.

The square root of 155143397 is about 12455.6572287455. The cubic root of 155143397 is about 537.3341368163.

The spelling of 155143397 in words is "one hundred fifty-five million, one hundred forty-three thousand, three hundred ninety-seven".