9513745521 has 32 divisors (see below), whose sum is σ = 14660997120. Its totient is φ = 5375191104.

The previous prime is 9513745469. The next prime is 9513745529. The reversal of 9513745521 is 1255473159.

It is a happy number.

It is not a de Polignac number, because 9513745521 - 2⁷ = 9513745393 is a prime.

It is a super-2 number, since 2×9513745521² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9513745529) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1147236 + ... + 1155498.

It is an arithmetic number, because the mean of its divisors is an integer number (458156160).

Almost surely, 2^9513745521 is an apocalyptic number.

It is an amenable number.

9513745521 is a deficient number, since it is larger than the sum of its proper divisors (5147251599).

9513745521 is a wasteful number, since it uses less digits than its factorization.

9513745521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885.

The product of its digits is 189000, while the sum is 42.

The square root of 9513745521 is about 97538.4309951724. The cubic root of 9513745521 is about 2118.9327665730.

The spelling of 9513745521 in words is "nine billion, five hundred thirteen million, seven hundred forty-five thousand, five hundred twenty-one".