51617740 has 12 divisors (see below), whose sum is σ = 108397296. Its totient is φ = 20647088.

The previous prime is 51617719. The next prime is 51617749. The reversal of 51617740 is 4771615.

It is not an unprimeable number, because it can be changed into a prime (51617749) 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, 1290424 + ... + 1290463.

It is an arithmetic number, because the mean of its divisors is an integer number (9033108).

Almost surely, 2^51617740 is an apocalyptic number.

It is an amenable number.

51617740 is an abundant number, since it is smaller than the sum of its proper divisors (56779556).

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

51617740 is a wasteful number, since it uses less digits than its factorization.

51617740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580896 (or 2580894 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 51617740 is about 7184.5486984222. The cubic root of 51617740 is about 372.3342565490.

The spelling of 51617740 in words is "fifty-one million, six hundred seventeen thousand, seven hundred forty".