1534213665 has 12 divisors (see below), whose sum is σ = 2659303764. Its totient is φ = 818247264.

The previous prime is 1534213663. The next prime is 1534213669. The reversal of 1534213665 is 5663124351.

1534213665 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1175186961 + 359026704 = 34281^2 + 18948^2 .

It is not a de Polignac number, because 1534213665 - 2¹ = 1534213663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1534213661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17046774 + ... + 17046863.

It is an arithmetic number, because the mean of its divisors is an integer number (221608647).

Almost surely, 2^1534213665 is an apocalyptic number.

1534213665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1534213665 is a deficient number, since it is larger than the sum of its proper divisors (1125090099).

1534213665 is a wasteful number, since it uses less digits than its factorization.

1534213665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34093648 (or 34093645 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1534213665 is about 39169.0396231513. The cubic root of 1534213665 is about 1153.3522013371.

The spelling of 1534213665 in words is "one billion, five hundred thirty-four million, two hundred thirteen thousand, six hundred sixty-five".