155630405 has 8 divisors (see below), whose sum is σ = 213436032. Its totient is φ = 106717968.

The previous prime is 155630381. The next prime is 155630407. The reversal of 155630405 is 504036551.

155630405 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 not a de Polignac number, because 155630405 - 2⁸ = 155630149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155630407) 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, 2223257 + ... + 2223326.

It is an arithmetic number, because the mean of its divisors is an integer number (26679504).

Almost surely, 2^155630405 is an apocalyptic number.

It is an amenable number.

155630405 is a deficient number, since it is larger than the sum of its proper divisors (57805627).

155630405 is an equidigital number, since it uses as much as digits as its factorization.

155630405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4446595.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 155630405 is about 12475.1915816952. The cubic root of 155630405 is about 537.8957950130.

Adding to 155630405 its reverse (504036551), we get a palindrome (659666956).

The spelling of 155630405 in words is "one hundred fifty-five million, six hundred thirty thousand, four hundred five".