51142480 has 40 divisors (see below), whose sum is σ = 121679712. Its totient is φ = 19979904.

The previous prime is 51142463. The next prime is 51142499. The reversal of 51142480 is 8424115.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3994 + ... + 10873.

Almost surely, 2^51142480 is an apocalyptic number.

It is an amenable number.

51142480 is an abundant number, since it is smaller than the sum of its proper divisors (70537232).

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

51142480 is a wasteful number, since it uses less digits than its factorization.

51142480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14923 (or 14917 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 51142480 is about 7151.3970663081. The cubic root of 51142480 is about 371.1880003181.

Adding to 51142480 its reverse (8424115), we get a palindrome (59566595).

The spelling of 51142480 in words is "fifty-one million, one hundred forty-two thousand, four hundred eighty".