61033521 has 4 divisors (see below), whose sum is σ = 81378032. Its totient is φ = 40689012.

The previous prime is 61033507. The next prime is 61033523. The reversal of 61033521 is 12533016.

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 not a de Polignac number, because 61033521 - 2¹¹ = 61031473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61033523) 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, 10172251 + ... + 10172256.

It is an arithmetic number, because the mean of its divisors is an integer number (20344508).

Almost surely, 2^61033521 is an apocalyptic number.

It is an amenable number.

61033521 is a deficient number, since it is larger than the sum of its proper divisors (20344511).

61033521 is a wasteful number, since it uses less digits than its factorization.

61033521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20344510.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 61033521 is about 7812.3953432990. The cubic root of 61033521 is about 393.7218118395.

Adding to 61033521 its reverse (12533016), we get a palindrome (73566537).

The spelling of 61033521 in words is "sixty-one million, thirty-three thousand, five hundred twenty-one".