51620463 has 16 divisors (see below), whose sum is σ = 77919840. Its totient is φ = 33763392.

The previous prime is 51620461. The next prime is 51620467. The reversal of 51620463 is 36402615.

It is not a de Polignac number, because 51620463 - 2¹ = 51620461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51620461) 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, 16606 + ... + 19467.

It is an arithmetic number, because the mean of its divisors is an integer number (4869990).

Almost surely, 2^51620463 is an apocalyptic number.

51620463 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

51620463 is a deficient number, since it is larger than the sum of its proper divisors (26299377).

51620463 is a wasteful number, since it uses less digits than its factorization.

51620463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36135 (or 36129 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 51620463 is about 7184.7381998233. The cubic root of 51620463 is about 372.3408037061.

The spelling of 51620463 in words is "fifty-one million, six hundred twenty thousand, four hundred sixty-three".