51620115 has 24 divisors (see below), whose sum is σ = 85366224. Its totient is φ = 26635200.

The previous prime is 51620099. The next prime is 51620137. The reversal of 51620115 is 51102615.

It is not a de Polignac number, because 51620115 - 2⁴ = 51620099 is a prime.

It is a super-2 number, since 2×51620115² = 5329272545226450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51620091 and 51620100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12625 + ... + 16205.

It is an arithmetic number, because the mean of its divisors is an integer number (3556926).

Almost surely, 2^51620115 is an apocalyptic number.

51620115 is a deficient number, since it is larger than the sum of its proper divisors (33746109).

51620115 is a wasteful number, since it uses less digits than its factorization.

51620115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651 (or 3620 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 51620115 is about 7184.7139817810. The cubic root of 51620115 is about 372.3399669908.

The spelling of 51620115 in words is "fifty-one million, six hundred twenty thousand, one hundred fifteen".