51140712 has 48 divisors (see below), whose sum is σ = 148728960. Its totient is φ = 14611296.

The previous prime is 51140689. The next prime is 51140737. The reversal of 51140712 is 21704115.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20568 + ... + 22919.

It is an arithmetic number, because the mean of its divisors is an integer number (3098520).

Almost surely, 2^51140712 is an apocalyptic number.

It is an amenable number.

51140712 is an abundant number, since it is smaller than the sum of its proper divisors (97588248).

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

51140712 is a wasteful number, since it uses less digits than its factorization.

51140712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43510 (or 43499 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 51140712 is about 7151.2734530292. The cubic root of 51140712 is about 371.1837229349.

Adding to 51140712 its reverse (21704115), we get a palindrome (72844827).

The spelling of 51140712 in words is "fifty-one million, one hundred forty thousand, seven hundred twelve".