51620230 has 32 divisors (see below), whose sum is σ = 95981760. Its totient is φ = 19975680.

The previous prime is 51620227. The next prime is 51620237. The reversal of 51620230 is 3202615.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51620198 and 51620207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51620237) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55711 + ... + 56629.

It is an arithmetic number, because the mean of its divisors is an integer number (2999430).

Almost surely, 2^51620230 is an apocalyptic number.

51620230 is a deficient number, since it is larger than the sum of its proper divisors (44361530).

51620230 is a wasteful number, since it uses less digits than its factorization.

51620230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 51620230 is about 7184.7219848787. The cubic root of 51620230 is about 372.3402434919.

Adding to 51620230 its reverse (3202615), we get a palindrome (54822845).

The spelling of 51620230 in words is "fifty-one million, six hundred twenty thousand, two hundred thirty".