61363521 has 16 divisors (see below), whose sum is σ = 95694400. Its totient is φ = 38755584.

The previous prime is 61363493. The next prime is 61363543. The reversal of 61363521 is 12536316.

61363521 is a `hidden beast` number, since 6 + 1 + 3 + 635 + 21 = 666.

It is not a de Polignac number, because 61363521 - 2¹⁸ = 61101377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61367521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59296 + ... + 60321.

It is an arithmetic number, because the mean of its divisors is an integer number (5980900).

Almost surely, 2^61363521 is an apocalyptic number.

It is an amenable number.

61363521 is a deficient number, since it is larger than the sum of its proper divisors (34330879).

61363521 is a wasteful number, since it uses less digits than its factorization.

61363521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119645 (or 119639 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 61363521 is about 7833.4871545181. The cubic root of 61363521 is about 394.4301369729.

Adding to 61363521 its reverse (12536316), we get a palindrome (73899837).

The spelling of 61363521 in words is "sixty-one million, three hundred sixty-three thousand, five hundred twenty-one".