51410640 has 40 divisors (see below), whose sum is σ = 159373728. Its totient is φ = 13709440.

The previous prime is 51410633. The next prime is 51410647. The reversal of 51410640 is 4601415.

It is an interprime number because it is at equal distance from previous prime (51410633) and next prime (51410647).

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51410647) by changing a digit.

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, 106866 + ... + 107345.

Almost surely, 2^51410640 is an apocalyptic number.

It is an amenable number.

51410640 is an abundant number, since it is smaller than the sum of its proper divisors (107963088).

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

51410640 is a wasteful number, since it uses less digits than its factorization.

51410640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214227 (or 214221 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 51410640 is about 7170.1213378854. The cubic root of 51410640 is about 371.8356309334.

The spelling of 51410640 in words is "fifty-one million, four hundred ten thousand, six hundred forty".