61321008 has 40 divisors (see below), whose sum is σ = 181043968. Its totient is φ = 17520192.

The previous prime is 61321003. The next prime is 61321009. The reversal of 61321008 is 80012316.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61321003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90916 + ... + 91587.

Almost surely, 2^61321008 is an apocalyptic number.

It is an amenable number.

61321008 is an abundant number, since it is smaller than the sum of its proper divisors (119722960).

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

61321008 is a wasteful number, since it uses less digits than its factorization.

61321008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182521 (or 182515 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61321008 is about 7830.7731419062. The cubic root of 61321008 is about 394.3390281075.

It can be divided in two parts, 6132 and 1008, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 61321008 in words is "sixty-one million, three hundred twenty-one thousand, eight".