51990606 has 16 divisors (see below), whose sum is σ = 115534800. Its totient is φ = 17330184.

The previous prime is 51990599. The next prime is 51990613. The reversal of 51990606 is 60609915.

It is an interprime number because it is at equal distance from previous prime (51990599) and next prime (51990613).

It is a super-2 number, since 2×51990606² = 5406046224494472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481341 + ... + 481448.

It is an arithmetic number, because the mean of its divisors is an integer number (7220925).

Almost surely, 2^51990606 is an apocalyptic number.

51990606 is an abundant number, since it is smaller than the sum of its proper divisors (63544194).

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

51990606 is a wasteful number, since it uses less digits than its factorization.

51990606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962800 (or 962794 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 51990606 is about 7210.4511648024. The cubic root of 51990606 is about 373.2286379116.

It can be divided in two parts, 519 and 90606, that added together give a cube (91125 = 45³).

The spelling of 51990606 in words is "fifty-one million, nine hundred ninety thousand, six hundred six".