51609356 has 6 divisors (see below), whose sum is σ = 90316380. Its totient is φ = 25804676.

The previous prime is 51609353. The next prime is 51609359. The reversal of 51609356 is 65390615.

It is an interprime number because it is at equal distance from previous prime (51609353) and next prime (51609359).

It is not an unprimeable number, because it can be changed into a prime (51609353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6451166 + ... + 6451173.

It is an arithmetic number, because the mean of its divisors is an integer number (15052730).

Almost surely, 2^51609356 is an apocalyptic number.

It is an amenable number.

51609356 is a deficient number, since it is larger than the sum of its proper divisors (38707024).

51609356 is a wasteful number, since it uses less digits than its factorization.

51609356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12902343 (or 12902341 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 35.

The square root of 51609356 is about 7183.9652003611. The cubic root of 51609356 is about 372.3140966877.

The spelling of 51609356 in words is "fifty-one million, six hundred nine thousand, three hundred fifty-six".