152055781 has 4 divisors (see below), whose sum is σ = 154924812. Its totient is φ = 149186752.

The previous prime is 152055733. The next prime is 152055791. The reversal of 152055781 is 187550251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187550251 = 7 ⋅26792893.

It can be written as a sum of positive squares in 2 ways, for example, as 48525156 + 103530625 = 6966^2 + 10175^2 .

It is a cyclic number.

It is not a de Polignac number, because 152055781 - 2⁷ = 152055653 is a prime.

It is a super-2 number, since 2×152055781² = 46241921071039922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152055731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434436 + ... + 1434541.

It is an arithmetic number, because the mean of its divisors is an integer number (38731203).

Almost surely, 2^152055781 is an apocalyptic number.

It is an amenable number.

152055781 is a deficient number, since it is larger than the sum of its proper divisors (2869031).

152055781 is an equidigital number, since it uses as much as digits as its factorization.

152055781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869030.

The product of its (nonzero) digits is 14000, while the sum is 34.

The square root of 152055781 is about 12331.0900167017. The cubic root of 152055781 is about 533.7456051427.

The spelling of 152055781 in words is "one hundred fifty-two million, fifty-five thousand, seven hundred eighty-one".