51903456 has 96 divisors (see below), whose sum is σ = 155167488. Its totient is φ = 15037440.

The previous prime is 51903443. The next prime is 51903457. The reversal of 51903456 is 65430915.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51903457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23220 + ... + 25356.

It is an arithmetic number, because the mean of its divisors is an integer number (1616328).

Almost surely, 2^51903456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51903456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77583744).

51903456 is an abundant number, since it is smaller than the sum of its proper divisors (103264032).

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

51903456 is a wasteful number, since it uses less digits than its factorization.

51903456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184 (or 2176 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 51903456 is about 7204.4053189698. The cubic root of 51903456 is about 373.0199779902.

It can be divided in two parts, 5190 and 3456, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 51903456 in words is "fifty-one million, nine hundred three thousand, four hundred fifty-six".