51420401 has 8 divisors (see below), whose sum is σ = 52291008. Its totient is φ = 50554000.

The previous prime is 51420371. The next prime is 51420407. The reversal of 51420401 is 10402415.

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

It is a cyclic number.

It is not a de Polignac number, because 51420401 - 2⁶ = 51420337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51420401.

It is not an unprimeable number, because it can be changed into a prime (51420407) 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, 31946 + ... + 33516.

It is an arithmetic number, because the mean of its divisors is an integer number (6536376).

Almost surely, 2^51420401 is an apocalyptic number.

It is an amenable number.

51420401 is a deficient number, since it is larger than the sum of its proper divisors (870607).

51420401 is a wasteful number, since it uses less digits than its factorization.

51420401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2103.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 51420401 is about 7170.8019774639. The cubic root of 51420401 is about 371.8591621059.

Adding to 51420401 its reverse (10402415), we get a palindrome (61822816).

The spelling of 51420401 in words is "fifty-one million, four hundred twenty thousand, four hundred one".