53750981 has 4 divisors (see below), whose sum is σ = 56580000. Its totient is φ = 50921964.

The previous prime is 53750971. The next prime is 53751001. The reversal of 53750981 is 18905735.

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: 18905735 = 5 ⋅3781147.

It is a cyclic number.

It is not a de Polignac number, because 53750981 - 2¹⁸ = 53488837 is a prime.

It is a super-2 number, since 2×53750981² = 5778335916924722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53750941) 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, 1414481 + ... + 1414518.

It is an arithmetic number, because the mean of its divisors is an integer number (14145000).

Almost surely, 2^53750981 is an apocalyptic number.

It is an amenable number.

53750981 is a deficient number, since it is larger than the sum of its proper divisors (2829019).

53750981 is a wasteful number, since it uses less digits than its factorization.

53750981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2829018.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 53750981 is about 7331.5060526470. The cubic root of 53750981 is about 377.3944116487.

The spelling of 53750981 in words is "fifty-three million, seven hundred fifty thousand, nine hundred eighty-one".