53951813 has 4 divisors (see below), whose sum is σ = 56297568. Its totient is φ = 51606060.

The previous prime is 53951801. The next prime is 53951819. The reversal of 53951813 is 31815935.

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: 31815935 = 5 ⋅6363187.

It is a cyclic number.

It is not a de Polignac number, because 53951813 - 2¹⁴ = 53935429 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 (53951819) 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, 1172843 + ... + 1172888.

It is an arithmetic number, because the mean of its divisors is an integer number (14074392).

Almost surely, 2^53951813 is an apocalyptic number.

It is an amenable number.

53951813 is a deficient number, since it is larger than the sum of its proper divisors (2345755).

53951813 is a wasteful number, since it uses less digits than its factorization.

53951813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345754.

The product of its digits is 16200, while the sum is 35.

The square root of 53951813 is about 7345.1897865202. The cubic root of 53951813 is about 377.8638522215.

The spelling of 53951813 in words is "fifty-three million, nine hundred fifty-one thousand, eight hundred thirteen".