51900340 has 12 divisors (see below), whose sum is σ = 108990756. Its totient is φ = 20760128.

The previous prime is 51900323. The next prime is 51900347. The reversal of 51900340 is 4300915.

It can be written as a sum of positive squares in 2 ways, for example, as 37429924 + 14470416 = 6118^2 + 3804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51900347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297489 + ... + 1297528.

It is an arithmetic number, because the mean of its divisors is an integer number (9082563).

Almost surely, 2^51900340 is an apocalyptic number.

It is an amenable number.

51900340 is an abundant number, since it is smaller than the sum of its proper divisors (57090416).

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

51900340 is a wasteful number, since it uses less digits than its factorization.

51900340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595026 (or 2595024 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 51900340 is about 7204.1890591516. The cubic root of 51900340 is about 373.0125131468.

The spelling of 51900340 in words is "fifty-one million, nine hundred thousand, three hundred forty".