154340215321 has 8 divisors (see below), whose sum is σ = 154575649800. Its totient is φ = 154104961920.

The previous prime is 154340215297. The next prime is 154340215357. The reversal of 154340215321 is 123512043451.

It can be written as a sum of positive squares in 4 ways, for example, as 44779215321 + 109561000000 = 211611^2 + 331000^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154340215321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154340215391) 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, 1712301 + ... + 1800181.

It is an arithmetic number, because the mean of its divisors is an integer number (19321956225).

Almost surely, 2^154340215321 is an apocalyptic number.

It is an amenable number.

154340215321 is a deficient number, since it is larger than the sum of its proper divisors (235434479).

154340215321 is a wasteful number, since it uses less digits than its factorization.

154340215321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90539.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 154340215321 its reverse (123512043451), we get a palindrome (277852258772).

The spelling of 154340215321 in words is "one hundred fifty-four billion, three hundred forty million, two hundred fifteen thousand, three hundred twenty-one".