51617290 has 16 divisors (see below), whose sum is σ = 96951168. Its totient is φ = 19749136.

The previous prime is 51617273. The next prime is 51617297. The reversal of 51617290 is 9271615.

It is not an unprimeable number, because it can be changed into a prime (51617297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111982 + ... + 112441.

It is an arithmetic number, because the mean of its divisors is an integer number (6059448).

Almost surely, 2^51617290 is an apocalyptic number.

51617290 is a deficient number, since it is larger than the sum of its proper divisors (45333878).

51617290 is a wasteful number, since it uses less digits than its factorization.

51617290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224453.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 51617290 is about 7184.5173811468. The cubic root of 51617290 is about 372.3331745508. Note that the first 3 decimals are identical.

The spelling of 51617290 in words is "fifty-one million, six hundred seventeen thousand, two hundred ninety".