155315279 has 8 divisors (see below), whose sum is σ = 178434048. Its totient is φ = 132429240.

The previous prime is 155315273. The next prime is 155315287. The reversal of 155315279 is 972513551.

155315279 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 155315279 - 2¹² = 155311183 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 (155315273) 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, 56747 + ... + 59420.

It is an arithmetic number, because the mean of its divisors is an integer number (22304256).

Almost surely, 2^155315279 is an apocalyptic number.

155315279 is a deficient number, since it is larger than the sum of its proper divisors (23118769).

155315279 is a wasteful number, since it uses less digits than its factorization.

155315279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116365.

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

The square root of 155315279 is about 12462.5550751040. Note that the first 3 decimals coincide. The cubic root of 155315279 is about 537.5324994952.

The spelling of 155315279 in words is "one hundred fifty-five million, three hundred fifteen thousand, two hundred seventy-nine".