51511252200 has 48 divisors (see below), whose sum is σ = 159684883680. Its totient is φ = 13736333760.

The previous prime is 51511252187. The next prime is 51511252213. The reversal of 51511252200 is 225211515.

It is an interprime number because it is at equal distance from previous prime (51511252187) and next prime (51511252213).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 42925444 + ... + 42926643.

It is an arithmetic number, because the mean of its divisors is an integer number (3326768410).

Almost surely, 2^51511252200 is an apocalyptic number.

51511252200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51511252200 is an abundant number, since it is smaller than the sum of its proper divisors (108173631480).

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

51511252200 is a wasteful number, since it uses less digits than its factorization.

51511252200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85852106 (or 85852097 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 24.

Adding to 51511252200 its reverse (225211515), we get a palindrome (51736463715).

The spelling of 51511252200 in words is "fifty-one billion, five hundred eleven million, two hundred fifty-two thousand, two hundred".