51072437 has 16 divisors (see below), whose sum is σ = 61306560. Its totient is φ = 42031872.

The previous prime is 51072391. The next prime is 51072449. The reversal of 51072437 is 73427015.

It is a cyclic number.

It is not a de Polignac number, because 51072437 - 2⁸ = 51072181 is a prime.

It is a super-2 number, since 2×51072437² = 5216787642237938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1883 + ... + 10280.

It is an arithmetic number, because the mean of its divisors is an integer number (3831660).

Almost surely, 2^51072437 is an apocalyptic number.

It is an amenable number.

51072437 is a deficient number, since it is larger than the sum of its proper divisors (10234123).

51072437 is a wasteful number, since it uses less digits than its factorization.

51072437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12212.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 51072437 is about 7146.4982334007. The cubic root of 51072437 is about 371.0184674150.

The spelling of 51072437 in words is "fifty-one million, seventy-two thousand, four hundred thirty-seven".