155087481971 has 4 divisors (see below), whose sum is σ = 155114748600. Its totient is φ = 155060215344.

The previous prime is 155087481959. The next prime is 155087482001. The reversal of 155087481971 is 179184780551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179184780551 = 7 ⋅25597825793.

It is a cyclic number.

It is not a de Polignac number, because 155087481971 - 2³⁰ = 154013740147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155087471971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13624781 + ... + 13636158.

It is an arithmetic number, because the mean of its divisors is an integer number (38778687150).

Almost surely, 2^155087481971 is an apocalyptic number.

155087481971 is a deficient number, since it is larger than the sum of its proper divisors (27266629).

155087481971 is an equidigital number, since it uses as much as digits as its factorization.

155087481971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27266628.

The product of its (nonzero) digits is 2822400, while the sum is 56.

The spelling of 155087481971 in words is "one hundred fifty-five billion, eighty-seven million, four hundred eighty-one thousand, nine hundred seventy-one".