51195240 has 192 divisors, whose sum is σ = 180835200. Its totient is φ = 13001472.

The previous prime is 51195233. The next prime is 51195247. The reversal of 51195240 is 4259115.

It is an interprime number because it is at equal distance from previous prime (51195233) and next prime (51195247).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51195247) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 223446 + ... + 223674.

It is an arithmetic number, because the mean of its divisors is an integer number (941850).

Almost surely, 2^51195240 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 51195240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90417600).

51195240 is an abundant number, since it is smaller than the sum of its proper divisors (129639960).

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

51195240 is a wasteful number, since it uses less digits than its factorization.

51195240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 262 counting only the distinct ones).

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

The square root of 51195240 is about 7155.0849051566. The cubic root of 51195240 is about 371.3155990601.

The spelling of 51195240 in words is "fifty-one million, one hundred ninety-five thousand, two hundred forty".