155204262321 has 8 divisors (see below), whose sum is σ = 206946160320. Its totient is φ = 103465936272.

The previous prime is 155204262287. The next prime is 155204262329. The reversal of 155204262321 is 123262402551.

It is a happy number.

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

It is not a de Polignac number, because 155204262321 - 2²⁵ = 155170707889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155204262329) 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, 789901 + ... + 966618.

It is an arithmetic number, because the mean of its divisors is an integer number (25868270040).

Almost surely, 2^155204262321 is an apocalyptic number.

It is an amenable number.

155204262321 is a deficient number, since it is larger than the sum of its proper divisors (51741897999).

155204262321 is a wasteful number, since it uses less digits than its factorization.

155204262321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785975.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 155204262321 its reverse (123262402551), we get a palindrome (278466664872).

The spelling of 155204262321 in words is "one hundred fifty-five billion, two hundred four million, two hundred sixty-two thousand, three hundred twenty-one".