51625380 has 24 divisors (see below), whose sum is σ = 144551232. Its totient is φ = 13766752.

The previous prime is 51625297. The next prime is 51625391. The reversal of 51625380 is 8352615.

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

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, 430152 + ... + 430271.

It is an arithmetic number, because the mean of its divisors is an integer number (6022968).

Almost surely, 2^51625380 is an apocalyptic number.

It is an amenable number.

51625380 is an abundant number, since it is smaller than the sum of its proper divisors (92925852).

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

51625380 is a wasteful number, since it uses less digits than its factorization.

51625380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860435 (or 860433 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 51625380 is about 7185.0803753333. The cubic root of 51625380 is about 372.3526255140.

Adding to 51625380 its reverse (8352615), we get a palindrome (59977995).

The spelling of 51625380 in words is "fifty-one million, six hundred twenty-five thousand, three hundred eighty".