61521353 has 4 divisors (see below), whose sum is σ = 61595520. Its totient is φ = 61447188.

The previous prime is 61521349. The next prime is 61521359. The reversal of 61521353 is 35312516.

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.

It is a cyclic number.

It is not a de Polignac number, because 61521353 - 2² = 61521349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61521359) 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, 35825 + ... + 37502.

It is an arithmetic number, because the mean of its divisors is an integer number (15398880).

Almost surely, 2^61521353 is an apocalyptic number.

It is an amenable number.

61521353 is a deficient number, since it is larger than the sum of its proper divisors (74167).

61521353 is an equidigital number, since it uses as much as digits as its factorization.

61521353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74166.

The product of its digits is 2700, while the sum is 26.

The square root of 61521353 is about 7843.5548700828. The cubic root of 61521353 is about 394.7680163222.

Adding to 61521353 its reverse (35312516), we get a palindrome (96833869).

The spelling of 61521353 in words is "sixty-one million, five hundred twenty-one thousand, three hundred fifty-three".