51990356 has 24 divisors (see below), whose sum is σ = 100245600. Its totient is φ = 23396000.

The previous prime is 51990347. The next prime is 51990377. The reversal of 51990356 is 65309915.

51990356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1406 + ... + 10293.

It is an arithmetic number, because the mean of its divisors is an integer number (4176900).

Almost surely, 2^51990356 is an apocalyptic number.

It is an amenable number.

51990356 is a deficient number, since it is larger than the sum of its proper divisors (48255244).

51990356 is a wasteful number, since it uses less digits than its factorization.

51990356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11815 (or 11813 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 51990356 is about 7210.4338288344. The cubic root of 51990356 is about 373.2280396797.

The spelling of 51990356 in words is "fifty-one million, nine hundred ninety thousand, three hundred fifty-six".