51611401 has 4 divisors (see below), whose sum is σ = 51838992. Its totient is φ = 51383812.

The previous prime is 51611393. The next prime is 51611423. The reversal of 51611401 is 10411615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51611401 - 2³ = 51611393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51611431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113455 + ... + 113908.

It is an arithmetic number, because the mean of its divisors is an integer number (12959748).

Almost surely, 2^51611401 is an apocalyptic number.

It is an amenable number.

51611401 is a deficient number, since it is larger than the sum of its proper divisors (227591).

51611401 is a wasteful number, since it uses less digits than its factorization.

51611401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227590.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 51611401 is about 7184.1075298189. The cubic root of 51611401 is about 372.3190142216.

The spelling of 51611401 in words is "fifty-one million, six hundred eleven thousand, four hundred one".