51231401 has 8 divisors (see below), whose sum is σ = 55266624. Its totient is φ = 47209680.

The previous prime is 51231377. The next prime is 51231409. The reversal of 51231401 is 10413215.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51231401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51231401.

It is not an unprimeable number, because it can be changed into a prime (51231409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5366 + ... + 11456.

It is an arithmetic number, because the mean of its divisors is an integer number (6908328).

Almost surely, 2^51231401 is an apocalyptic number.

It is an amenable number.

51231401 is a deficient number, since it is larger than the sum of its proper divisors (4035223).

51231401 is a wasteful number, since it uses less digits than its factorization.

51231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6751.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 51231401 is about 7157.6114032546. The cubic root of 51231401 is about 371.4030029103.

Adding to 51231401 its reverse (10413215), we get a palindrome (61644616).

It can be divided in two parts, 512 and 31401, that added together give a palindrome (31913).

The spelling of 51231401 in words is "fifty-one million, two hundred thirty-one thousand, four hundred one".