64155131 has 2 divisors, whose sum is σ = 64155132. Its totient is φ = 64155130.

The previous prime is 64155109. The next prime is 64155137. The reversal of 64155131 is 13155146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64155131 is a prime.

It is a super-2 number, since 2×64155131² = 8231761667254322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64155131.

It is not a weakly prime, because it can be changed into another prime (64155137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32077565 + 32077566.

It is an arithmetic number, because the mean of its divisors is an integer number (32077566).

Almost surely, 2^64155131 is an apocalyptic number.

64155131 is a deficient number, since it is larger than the sum of its proper divisors (1).

64155131 is an equidigital number, since it uses as much as digits as its factorization.

64155131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 64155131 is about 8009.6898192127. The cubic root of 64155131 is about 400.3229288056.

The spelling of 64155131 in words is "sixty-four million, one hundred fifty-five thousand, one hundred thirty-one".