51261534 has 12 divisors (see below), whose sum is σ = 111066696. Its totient is φ = 17087172.

The previous prime is 51261517. The next prime is 51261541. The reversal of 51261534 is 43516215.

51261534 is a `hidden beast` number, since 5 + 12 + 615 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 51261498 and 51261507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1423914 + ... + 1423949.

It is an arithmetic number, because the mean of its divisors is an integer number (9255558).

Almost surely, 2^51261534 is an apocalyptic number.

51261534 is an abundant number, since it is smaller than the sum of its proper divisors (59805162).

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

51261534 is a wasteful number, since it uses less digits than its factorization.

51261534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847871 (or 2847868 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51261534 is about 7159.7160558223. The cubic root of 51261534 is about 371.4758052216.

Adding to 51261534 its reverse (43516215), we get a palindrome (94777749).

The spelling of 51261534 in words is "fifty-one million, two hundred sixty-one thousand, five hundred thirty-four".