51940252 has 48 divisors (see below), whose sum is σ = 115505152. Its totient is φ = 19880640.

The previous prime is 51940249. The next prime is 51940271. The reversal of 51940252 is 25204915.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 51940252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8983 + ... + 13585.

Almost surely, 2^51940252 is an apocalyptic number.

51940252 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51940252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57752576).

51940252 is an abundant number, since it is smaller than the sum of its proper divisors (63564900).

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

51940252 is a wasteful number, since it uses less digits than its factorization.

51940252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4658 (or 4656 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 51940252 is about 7206.9585818152. The cubic root of 51940252 is about 373.1081057176.

The spelling of 51940252 in words is "fifty-one million, nine hundred forty thousand, two hundred fifty-two".