1532172157 has 2 divisors, whose sum is σ = 1532172158. Its totient is φ = 1532172156.

The previous prime is 1532172079. The next prime is 1532172199. The reversal of 1532172157 is 7512712351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 964350916 + 567821241 = 31054^2 + 23829^2 .

It is a cyclic number.

It is not a de Polignac number, because 1532172157 - 2⁷ = 1532172029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1532172557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 766086078 + 766086079.

It is an arithmetic number, because the mean of its divisors is an integer number (766086079).

Almost surely, 2^1532172157 is an apocalyptic number.

It is an amenable number.

1532172157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1532172157 is an equidigital number, since it uses as much as digits as its factorization.

1532172157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 1532172157 is about 39142.9707227236. The cubic root of 1532172157 is about 1152.8404032417.

It can be divided in two parts, 15321 and 72157, that added together give a palindrome (87478).

The spelling of 1532172157 in words is "one billion, five hundred thirty-two million, one hundred seventy-two thousand, one hundred fifty-seven".