155005438 has 32 divisors (see below), whose sum is σ = 271160064. Its totient is φ = 65083392.

The previous prime is 155005429. The next prime is 155005447. The reversal of 155005438 is 834500551.

It is an interprime number because it is at equal distance from previous prime (155005429) and next prime (155005447).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240745 + ... + 241387.

It is an arithmetic number, because the mean of its divisors is an integer number (8473752).

Almost surely, 2^155005438 is an apocalyptic number.

155005438 is a deficient number, since it is larger than the sum of its proper divisors (116154626).

155005438 is a wasteful number, since it uses less digits than its factorization.

155005438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 155005438 is about 12450.1179914088. The cubic root of 155005438 is about 537.1748174049.

Adding to 155005438 its reverse (834500551), we get a palindrome (989505989).

It can be divided in two parts, 15500543 and 8, that added together give a palindrome (15500551).

The spelling of 155005438 in words is "one hundred fifty-five million, five thousand, four hundred thirty-eight".