155402152321 has 8 divisors (see below), whose sum is σ = 167359372544. Its totient is φ = 143445390480.

The previous prime is 155402152319. The next prime is 155402152333. The reversal of 155402152321 is 123251204551.

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 155402152321 - 2¹ = 155402152319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155402152391) 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, 969286 + ... + 1118176.

It is an arithmetic number, because the mean of its divisors is an integer number (20919921568).

Almost surely, 2^155402152321 is an apocalyptic number.

It is an amenable number.

155402152321 is a deficient number, since it is larger than the sum of its proper divisors (11957220223).

155402152321 is a wasteful number, since it uses less digits than its factorization.

155402152321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229191.

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

Adding to 155402152321 its reverse (123251204551), we get a palindrome (278653356872).

The spelling of 155402152321 in words is "one hundred fifty-five billion, four hundred two million, one hundred fifty-two thousand, three hundred twenty-one".