51620594 has 4 divisors (see below), whose sum is σ = 77430894. Its totient is φ = 25810296.

The previous prime is 51620593. The next prime is 51620651. The reversal of 51620594 is 49502615.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27952369 + 23668225 = 5287^2 + 4865^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51620594.

It is not an unprimeable number, because it can be changed into a prime (51620593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12905147 + ... + 12905150.

Almost surely, 2^51620594 is an apocalyptic number.

51620594 is a deficient number, since it is larger than the sum of its proper divisors (25810300).

51620594 is a wasteful number, since it uses less digits than its factorization.

51620594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25810299.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 51620594 is about 7184.7473163640. The cubic root of 51620594 is about 372.3411186755.

The spelling of 51620594 in words is "fifty-one million, six hundred twenty thousand, five hundred ninety-four".