55631299 has 2 divisors, whose sum is σ = 55631300. Its totient is φ = 55631298.

The previous prime is 55631287. The next prime is 55631321. The reversal of 55631299 is 99213655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55631299 - 2⁷ = 55631171 is a prime.

It is not a weakly prime, because it can be changed into another prime (55631209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27815649 + 27815650.

It is an arithmetic number, because the mean of its divisors is an integer number (27815650).

Almost surely, 2^55631299 is an apocalyptic number.

55631299 is a deficient number, since it is larger than the sum of its proper divisors (1).

55631299 is an equidigital number, since it uses as much as digits as its factorization.

55631299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72900, while the sum is 40.

The square root of 55631299 is about 7458.6392190533. The cubic root of 55631299 is about 381.7447446357.

The spelling of 55631299 in words is "fifty-five million, six hundred thirty-one thousand, two hundred ninety-nine".