51903656 has 16 divisors (see below), whose sum is σ = 111222240. Its totient is φ = 22244400.

The previous prime is 51903653. The next prime is 51903659. The reversal of 51903656 is 65630915.

It is an interprime number because it is at equal distance from previous prime (51903653) and next prime (51903659).

It is not an unprimeable number, because it can be changed into a prime (51903653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463370 + ... + 463481.

It is an arithmetic number, because the mean of its divisors is an integer number (6951390).

Almost surely, 2^51903656 is an apocalyptic number.

51903656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51903656 is an abundant number, since it is smaller than the sum of its proper divisors (59318584).

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

51903656 is a wasteful number, since it uses less digits than its factorization.

51903656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926864 (or 926860 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 51903656 is about 7204.4191993526. The cubic root of 51903656 is about 373.0204571098.

The spelling of 51903656 in words is "fifty-one million, nine hundred three thousand, six hundred fifty-six".