151221343155 has 16 divisors (see below), whose sum is σ = 242742280704. Its totient is φ = 80388672480.

The previous prime is 151221343151. The next prime is 151221343181. The reversal of 151221343155 is 551343122151.

It is not a de Polignac number, because 151221343155 - 2² = 151221343151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151221343151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16414651 + ... + 16423860.

It is an arithmetic number, because the mean of its divisors is an integer number (15171392544).

Almost surely, 2^151221343155 is an apocalyptic number.

151221343155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

151221343155 is a deficient number, since it is larger than the sum of its proper divisors (91520937549).

151221343155 is a wasteful number, since it uses less digits than its factorization.

151221343155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32838826.

The product of its digits is 18000, while the sum is 33.

The spelling of 151221343155 in words is "one hundred fifty-one billion, two hundred twenty-one million, three hundred forty-three thousand, one hundred fifty-five".