55415537 has 2 divisors, whose sum is σ = 55415538. Its totient is φ = 55415536.

The previous prime is 55415501. The next prime is 55415557. The reversal of 55415537 is 73551455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 2401 = 7444^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 55415537 - 2⁶ = 55415473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55415497 and 55415506.

It is not a weakly prime, because it can be changed into another prime (55415557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27707768 + 27707769.

It is an arithmetic number, because the mean of its divisors is an integer number (27707769).

Almost surely, 2^55415537 is an apocalyptic number.

It is an amenable number.

55415537 is a deficient number, since it is larger than the sum of its proper divisors (1).

55415537 is an equidigital number, since it uses as much as digits as its factorization.

55415537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52500, while the sum is 35.

The square root of 55415537 is about 7444.1612690752. The cubic root of 55415537 is about 381.2505820290.

The spelling of 55415537 in words is "fifty-five million, four hundred fifteen thousand, five hundred thirty-seven".