51200615 has 4 divisors (see below), whose sum is σ = 61440744. Its totient is φ = 40960488.

The previous prime is 51200603. The next prime is 51200621. The reversal of 51200615 is 51600215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51200615 - 2¹⁶ = 51135079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120057 + ... + 5120066.

It is an arithmetic number, because the mean of its divisors is an integer number (15360186).

Almost surely, 2^51200615 is an apocalyptic number.

51200615 is a deficient number, since it is larger than the sum of its proper divisors (10240129).

51200615 is a wasteful number, since it uses less digits than its factorization.

51200615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240128.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 51200615 is about 7155.4605023017. The cubic root of 51200615 is about 371.3285934420.

It can be divided in two parts, 51200 and 615, that added together give a palindrome (51815).

The spelling of 51200615 in words is "fifty-one million, two hundred thousand, six hundred fifteen".