51401437 has 4 divisors (see below), whose sum is σ = 51662556. Its totient is φ = 51140320.

The previous prime is 51401423. The next prime is 51401443. The reversal of 51401437 is 73410415.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38862756 + 12538681 = 6234^2 + 3541^2 .

It is a cyclic number.

It is not a de Polignac number, because 51401437 - 2¹⁹ = 50877149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51401447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130264 + ... + 130657.

It is an arithmetic number, because the mean of its divisors is an integer number (12915639).

Almost surely, 2^51401437 is an apocalyptic number.

It is an amenable number.

51401437 is a deficient number, since it is larger than the sum of its proper divisors (261119).

51401437 is a wasteful number, since it uses less digits than its factorization.

51401437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261118.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 51401437 is about 7169.4795487539. The cubic root of 51401437 is about 371.8134422222.

The spelling of 51401437 in words is "fifty-one million, four hundred one thousand, four hundred thirty-seven".