55507723 has 2 divisors, whose sum is σ = 55507724. Its totient is φ = 55507722.

The previous prime is 55507693. The next prime is 55507757. The reversal of 55507723 is 32770555.

It is an a-pointer prime, because the next prime (55507757) can be obtained adding 55507723 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55507723 - 2¹³ = 55499531 is a prime.

It is a super-2 number, since 2×55507723² = 6162214625289458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55507783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27753861 + 27753862.

It is an arithmetic number, because the mean of its divisors is an integer number (27753862).

Almost surely, 2^55507723 is an apocalyptic number.

55507723 is a deficient number, since it is larger than the sum of its proper divisors (1).

55507723 is an equidigital number, since it uses as much as digits as its factorization.

55507723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36750, while the sum is 34.

The square root of 55507723 is about 7450.3505286664. The cubic root of 55507723 is about 381.4618735256.

The spelling of 55507723 in words is "fifty-five million, five hundred seven thousand, seven hundred twenty-three".