51023616 has 72 divisors (see below), whose sum is σ = 155213184. Its totient is φ = 14576640.

The previous prime is 51023597. The next prime is 51023657. The reversal of 51023616 is 61632015.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631 + ... + 10121.

Almost surely, 2^51023616 is an apocalyptic number.

51023616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51023616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77606592).

51023616 is an abundant number, since it is smaller than the sum of its proper divisors (104189568).

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

51023616 is an equidigital number, since it uses as much as digits as its factorization.

51023616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9517 (or 9503 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 51023616 is about 7143.0816878991. The cubic root of 51023616 is about 370.9002087978.

The spelling of 51023616 in words is "fifty-one million, twenty-three thousand, six hundred sixteen".