51072616 has 32 divisors (see below), whose sum is σ = 111242880. Its totient is φ = 21528000.

The previous prime is 51072613. The next prime is 51072649. The reversal of 51072616 is 61627015.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (51072613) 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, 4060 + ... + 10891.

It is an arithmetic number, because the mean of its divisors is an integer number (3476340).

Almost surely, 2^51072616 is an apocalyptic number.

51072616 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51072616 is an abundant number, since it is smaller than the sum of its proper divisors (60170264).

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

51072616 is a wasteful number, since it uses less digits than its factorization.

51072616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15025 (or 15021 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 51072616 is about 7146.5107570058. The cubic root of 51072616 is about 371.0189008662.

The spelling of 51072616 in words is "fifty-one million, seventy-two thousand, six hundred sixteen".