51277401 has 32 divisors (see below), whose sum is σ = 87745280. Its totient is φ = 28988928.

The previous prime is 51277381. The next prime is 51277403. The reversal of 51277401 is 10477215.

It is not a de Polignac number, because 51277401 - 2¹¹ = 51275353 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (51277403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16935 + ... + 19731.

It is an arithmetic number, because the mean of its divisors is an integer number (2742040).

Almost surely, 2^51277401 is an apocalyptic number.

It is an amenable number.

51277401 is a deficient number, since it is larger than the sum of its proper divisors (36467879).

51277401 is a wasteful number, since it uses less digits than its factorization.

51277401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910 (or 2904 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 51277401 is about 7160.8240447591. The cubic root of 51277401 is about 371.5141289451.

The spelling of 51277401 in words is "fifty-one million, two hundred seventy-seven thousand, four hundred one".