51169401 has 20 divisors (see below), whose sum is σ = 76665600. Its totient is φ = 34011576.

The previous prime is 51169397. The next prime is 51169463. The reversal of 51169401 is 10496115.

It is not a de Polignac number, because 51169401 - 2² = 51169397 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 (51164401) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34840 + ... + 36278.

It is an arithmetic number, because the mean of its divisors is an integer number (3833280).

Almost surely, 2^51169401 is an apocalyptic number.

It is an amenable number.

51169401 is a deficient number, since it is larger than the sum of its proper divisors (25496199).

51169401 is a wasteful number, since it uses less digits than its factorization.

51169401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1890 (or 1881 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 51169401 is about 7153.2790383152. The cubic root of 51169401 is about 371.2531190433.

The spelling of 51169401 in words is "fifty-one million, one hundred sixty-nine thousand, four hundred one".