51407580 has 48 divisors (see below), whose sum is σ = 164505600. Its totient is φ = 11750208.

The previous prime is 51407539. The next prime is 51407581. The reversal of 51407580 is 8570415.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51407581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60780 + ... + 61619.

It is an arithmetic number, because the mean of its divisors is an integer number (3427200).

Almost surely, 2^51407580 is an apocalyptic number.

It is an amenable number.

51407580 is an abundant number, since it is smaller than the sum of its proper divisors (113098020).

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

51407580 is a wasteful number, since it uses less digits than its factorization.

51407580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122418 (or 122416 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 51407580 is about 7169.9079491999. The cubic root of 51407580 is about 371.8282534748.

Adding to 51407580 its reverse (8570415), we get a palindrome (59977995).

It can be divided in two parts, 5140 and 7580, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 51407580 in words is "fifty-one million, four hundred seven thousand, five hundred eighty".