51267020500 has 24 divisors (see below), whose sum is σ = 111967173864. Its totient is φ = 20506808000.

The previous prime is 51267020473. The next prime is 51267020527. The reversal of 51267020500 is 502076215.

It is an interprime number because it is at equal distance from previous prime (51267020473) and next prime (51267020527).

It can be written as a sum of positive squares in 4 ways, for example, as 5811927696 + 45455092804 = 76236^2 + 213202^2 .

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, 51266521 + ... + 51267520.

It is an arithmetic number, because the mean of its divisors is an integer number (4665298911).

Almost surely, 2^51267020500 is an apocalyptic number.

51267020500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51267020500 is an abundant number, since it is smaller than the sum of its proper divisors (60700153364).

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

51267020500 is a wasteful number, since it uses less digits than its factorization.

51267020500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102534060 (or 102534048 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

Adding to 51267020500 its reverse (502076215), we get a palindrome (51769096715).

It can be divided in two parts, 5126 and 7020500, that added together give a triangular number (7025626 = T₃₇₄₈).

The spelling of 51267020500 in words is "fifty-one billion, two hundred sixty-seven million, twenty thousand, five hundred".