155400047 has 8 divisors (see below), whose sum is σ = 170142672. Its totient is φ = 140760000.

The previous prime is 155400017. The next prime is 155400061. The reversal of 155400047 is 740004551.

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 155400047 - 2¹² = 155395951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155399989 and 155400025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155400017) 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, 22454 + ... + 28547.

It is an arithmetic number, because the mean of its divisors is an integer number (21267834).

Almost surely, 2^155400047 is an apocalyptic number.

155400047 is a deficient number, since it is larger than the sum of its proper divisors (14742625).

155400047 is a wasteful number, since it uses less digits than its factorization.

155400047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51289.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 155400047 is about 12465.9555189324. The cubic root of 155400047 is about 537.6302732367.

Adding to 155400047 its reverse (740004551), we get a palindrome (895404598).

The spelling of 155400047 in words is "one hundred fifty-five million, four hundred thousand, forty-seven".