51401501 has 4 divisors (see below), whose sum is σ = 51660000. Its totient is φ = 51143004.

The previous prime is 51401477. The next prime is 51401507. The reversal of 51401501 is 10510415.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10510415 = 5 ⋅2102083.

It is a cyclic number.

It is not a de Polignac number, because 51401501 - 2¹⁸ = 51139357 is a prime.

It is a super-2 number, since 2×51401501² = 5284228610106002, which contains 22 as substring.

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 51401501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51401507) 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, 128951 + ... + 129348.

It is an arithmetic number, because the mean of its divisors is an integer number (12915000).

Almost surely, 2^51401501 is an apocalyptic number.

It is an amenable number.

51401501 is a deficient number, since it is larger than the sum of its proper divisors (258499).

51401501 is a wasteful number, since it uses less digits than its factorization.

51401501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258498.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 51401501 is about 7169.4840121169. The cubic root of 51401501 is about 371.8135965373.

Adding to 51401501 its reverse (10510415), we get a palindrome (61911916).

The spelling of 51401501 in words is "fifty-one million, four hundred one thousand, five hundred one".