51606030 has 64 divisors (see below), whose sum is σ = 142133760. Its totient is φ = 11746944.

The previous prime is 51606029. The next prime is 51606031. The reversal of 51606030 is 3060615.

It is an interprime number because it is at equal distance from previous prime (51606029) and next prime (51606031).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 51605988 and 51606006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51606031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83061 + ... + 83679.

It is an arithmetic number, because the mean of its divisors is an integer number (2220840).

Almost surely, 2^51606030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51606030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71066880).

51606030 is an abundant number, since it is smaller than the sum of its proper divisors (90527730).

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

51606030 is a wasteful number, since it uses less digits than its factorization.

51606030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 51606030 is about 7183.7337088731. The cubic root of 51606030 is about 372.3060985043.

Adding to 51606030 its reverse (3060615), we get a palindrome (54666645).

The spelling of 51606030 in words is "fifty-one million, six hundred six thousand, thirty".