55293731 has 2 divisors, whose sum is σ = 55293732. Its totient is φ = 55293730.

The previous prime is 55293727. The next prime is 55293767. The reversal of 55293731 is 13739255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55293731 - 2² = 55293727 is a prime.

It is a super-2 number, since 2×55293731² = 6114793375800722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55293691 and 55293700.

It is not a weakly prime, because it can be changed into another prime (55293701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27646865 + 27646866.

It is an arithmetic number, because the mean of its divisors is an integer number (27646866).

Almost surely, 2^55293731 is an apocalyptic number.

55293731 is a deficient number, since it is larger than the sum of its proper divisors (1).

55293731 is an equidigital number, since it uses as much as digits as its factorization.

55293731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 35.

The square root of 55293731 is about 7435.9754571946. The cubic root of 55293731 is about 380.9710414448.

The spelling of 55293731 in words is "fifty-five million, two hundred ninety-three thousand, seven hundred thirty-one".