55312501 has 2 divisors, whose sum is σ = 55312502. Its totient is φ = 55312500.

The previous prime is 55312489. The next prime is 55312507. The reversal of 55312501 is 10521355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33466225 + 21846276 = 5785^2 + 4674^2 .

It is a cyclic number.

It is not a de Polignac number, because 55312501 - 2⁵ = 55312469 is a prime.

It is a super-4 number, since 4×55312501⁴ (a number of 32 digits) contains 4444 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55312507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27656250 + 27656251.

It is an arithmetic number, because the mean of its divisors is an integer number (27656251).

Almost surely, 2^55312501 is an apocalyptic number.

It is an amenable number.

55312501 is a deficient number, since it is larger than the sum of its proper divisors (1).

55312501 is an equidigital number, since it uses as much as digits as its factorization.

55312501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55312501 is about 7437.2374575510. The cubic root of 55312501 is about 381.0141446883.

Adding to 55312501 its reverse (10521355), we get a palindrome (65833856).

The spelling of 55312501 in words is "fifty-five million, three hundred twelve thousand, five hundred one".