1532715397 has 4 divisors (see below), whose sum is σ = 1532826880. Its totient is φ = 1532603916.

The previous prime is 1532715347. The next prime is 1532715407. The reversal of 1532715397 is 7935172351.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1532715397 - 2¹¹ = 1532713349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1532715347) 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, 31647 + ... + 63772.

It is an arithmetic number, because the mean of its divisors is an integer number (383206720).

Almost surely, 2^1532715397 is an apocalyptic number.

It is an amenable number.

1532715397 is a deficient number, since it is larger than the sum of its proper divisors (111483).

1532715397 is an equidigital number, since it uses as much as digits as its factorization.

1532715397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111482.

The product of its digits is 198450, while the sum is 43.

The square root of 1532715397 is about 39149.9092846969. The cubic root of 1532715397 is about 1152.9766357612.

The spelling of 1532715397 in words is "one billion, five hundred thirty-two million, seven hundred fifteen thousand, three hundred ninety-seven".