51245910 has 48 divisors (see below), whose sum is σ = 134025840. Its totient is φ = 13584960.

The previous prime is 51245893. The next prime is 51245911. The reversal of 51245910 is 1954215.

51245910 is a `hidden beast` number, since 51 + 24 + 591 + 0 = 666.

It is a super-2 number, since 2×51245910² = 5252286583456200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14520 + ... + 17700.

It is an arithmetic number, because the mean of its divisors is an integer number (2792205).

Almost surely, 2^51245910 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51245910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67012920).

51245910 is an abundant number, since it is smaller than the sum of its proper divisors (82779930).

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

51245910 is a wasteful number, since it uses less digits than its factorization.

51245910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373 (or 3370 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 51245910 is about 7158.6248679478. The cubic root of 51245910 is about 371.4380606902.

The spelling of 51245910 in words is "fifty-one million, two hundred forty-five thousand, nine hundred ten".