51251401 has 8 divisors (see below), whose sum is σ = 54335744. Its totient is φ = 48256560.

The previous prime is 51251377. The next prime is 51251411. The reversal of 51251401 is 10415215.

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 51251401 - 2⁹ = 51250889 is a prime.

It is a super-2 number, since 2×51251401² = 5253412208925602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51251411) 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, 21195 + ... + 23488.

It is an arithmetic number, because the mean of its divisors is an integer number (6791968).

Almost surely, 2^51251401 is an apocalyptic number.

It is an amenable number.

51251401 is a deficient number, since it is larger than the sum of its proper divisors (3084343).

51251401 is a wasteful number, since it uses less digits than its factorization.

51251401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44751.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 51251401 is about 7159.0083810539. The cubic root of 51251401 is about 371.4513267476.

Adding to 51251401 its reverse (10415215), we get a palindrome (61666616).

The spelling of 51251401 in words is "fifty-one million, two hundred fifty-one thousand, four hundred one".