152705431 has 4 divisors (see below), whose sum is σ = 154188112. Its totient is φ = 151222752.

The previous prime is 152705417. The next prime is 152705453. The reversal of 152705431 is 134507251.

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: 134507251 = 19 ⋅7079329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152705431 is a prime.

It is a super-2 number, since 2×152705431² = 46637897313791522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 152705431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (152705461) 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, 741186 + ... + 741391.

It is an arithmetic number, because the mean of its divisors is an integer number (38547028).

Almost surely, 2^152705431 is an apocalyptic number.

152705431 is a deficient number, since it is larger than the sum of its proper divisors (1482681).

152705431 is a wasteful number, since it uses less digits than its factorization.

152705431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482680.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 152705431 is about 12357.4038940224. The cubic root of 152705431 is about 534.5046581221.

The spelling of 152705431 in words is "one hundred fifty-two million, seven hundred five thousand, four hundred thirty-one".