155512397 has 8 divisors (see below), whose sum is σ = 164311200. Its totient is φ = 146775024.

The previous prime is 155512393. The next prime is 155512429. The reversal of 155512397 is 793215551.

155512397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155512397 - 2² = 155512393 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 155512397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155512393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10103 + ... + 20324.

It is an arithmetic number, because the mean of its divisors is an integer number (20538900).

Almost surely, 2^155512397 is an apocalyptic number.

It is an amenable number.

155512397 is a deficient number, since it is larger than the sum of its proper divisors (8798803).

155512397 is a wasteful number, since it uses less digits than its factorization.

155512397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30715.

The product of its digits is 47250, while the sum is 38.

The square root of 155512397 is about 12470.4609778468. The cubic root of 155512397 is about 537.7598060386.

The spelling of 155512397 in words is "one hundred fifty-five million, five hundred twelve thousand, three hundred ninety-seven".