61350521 has 4 divisors (see below), whose sum is σ = 62508132. Its totient is φ = 60192912.

The previous prime is 61350517. The next prime is 61350533. The reversal of 61350521 is 12505316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25110121 + 36240400 = 5011^2 + 6020^2 .

It is a cyclic number.

It is not a de Polignac number, because 61350521 - 2² = 61350517 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 (61350511) 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, 578726 + ... + 578831.

It is an arithmetic number, because the mean of its divisors is an integer number (15627033).

Almost surely, 2^61350521 is an apocalyptic number.

It is an amenable number.

61350521 is a deficient number, since it is larger than the sum of its proper divisors (1157611).

61350521 is a wasteful number, since it uses less digits than its factorization.

61350521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157610.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 61350521 is about 7832.6573396262. The cubic root of 61350521 is about 394.4022813683.

Adding to 61350521 its reverse (12505316), we get a palindrome (73855837).

The spelling of 61350521 in words is "sixty-one million, three hundred fifty thousand, five hundred twenty-one".