155310313716021 has 8 divisors (see below), whose sum is σ = 207080526232960. Its totient is φ = 103540155171552.

The previous prime is 155310313715987. The next prime is 155310313716037. The reversal of 155310313716021 is 120617313013551.

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

It is not a de Polignac number, because 155310313716021 - 2²³ = 155310305327413 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 (155310313716521) 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, 6218461 + ... + 18689298.

It is an arithmetic number, because the mean of its divisors is an integer number (25885065779120).

Almost surely, 2^{155310313716021} is an apocalyptic number.

It is an amenable number.

155310313716021 is a deficient number, since it is larger than the sum of its proper divisors (51770212516939).

155310313716021 is a wasteful number, since it uses less digits than its factorization.

155310313716021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26986235.

The product of its (nonzero) digits is 56700, while the sum is 39.

Adding to 155310313716021 its reverse (120617313013551), we get a palindrome (275927626729572).

The spelling of 155310313716021 in words is "one hundred fifty-five trillion, three hundred ten billion, three hundred thirteen million, seven hundred sixteen thousand, twenty-one".