61533430 has 32 divisors (see below), whose sum is σ = 129533184. Its totient is φ = 20605536.

The previous prime is 61533427. The next prime is 61533467. The reversal of 61533430 is 3433516.

It is a junction number, because it is equal to n+sod(n) for n = 61533395 and 61533404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7212 + ... + 13231.

It is an arithmetic number, because the mean of its divisors is an integer number (4047912).

Almost surely, 2^61533430 is an apocalyptic number.

61533430 is an abundant number, since it is smaller than the sum of its proper divisors (67999754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61533430 is a wasteful number, since it uses less digits than its factorization.

61533430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20500.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 61533430 is about 7844.3247000618. The cubic root of 61533430 is about 394.7938463859.

Adding to 61533430 its reverse (3433516), we get a palindrome (64966946).

The spelling of 61533430 in words is "sixty-one million, five hundred thirty-three thousand, four hundred thirty".