51263901 has 16 divisors (see below), whose sum is σ = 81789120. Its totient is φ = 31546800.

The previous prime is 51263813. The next prime is 51263923. The reversal of 51263901 is 10936215.

51263901 is a `hidden beast` number, since 512 + 63 + 90 + 1 = 666.

It is not a de Polignac number, because 51263901 - 2¹⁰ = 51262877 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 (51223901) 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, 72675 + ... + 73376.

It is an arithmetic number, because the mean of its divisors is an integer number (5111820).

Almost surely, 2^51263901 is an apocalyptic number.

It is an amenable number.

51263901 is a deficient number, since it is larger than the sum of its proper divisors (30525219).

51263901 is a wasteful number, since it uses less digits than its factorization.

51263901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146073 (or 146067 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 51263901 is about 7159.8813537656. The cubic root of 51263901 is about 371.4815227622.

The spelling of 51263901 in words is "fifty-one million, two hundred sixty-three thousand, nine hundred one".