155551025291 has 4 divisors (see below), whose sum is σ = 155584474584. Its totient is φ = 155517576000.

The previous prime is 155551025263. The next prime is 155551025297. The reversal of 155551025291 is 192520155551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192520155551 = 421 ⋅457292531.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155551025291 is a prime.

It is a super-2 number, since 2×155551025291² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155551025297) 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, 16717670 + ... + 16726971.

It is an arithmetic number, because the mean of its divisors is an integer number (38896118646).

Almost surely, 2^155551025291 is an apocalyptic number.

155551025291 is a deficient number, since it is larger than the sum of its proper divisors (33449293).

155551025291 is an equidigital number, since it uses as much as digits as its factorization.

155551025291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33449292.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 155551025291 in words is "one hundred fifty-five billion, five hundred fifty-one million, twenty-five thousand, two hundred ninety-one".