78241151 has 2 divisors, whose sum is σ = 78241152. Its totient is φ = 78241150.

The previous prime is 78241109. The next prime is 78241171. The reversal of 78241151 is 15114287.

It is a strong prime.

It is an emirp because it is prime and its reverse (15114287) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78241151 - 2²⁶ = 11132287 is a prime.

It is a super-2 number, since 2×78241151² = 12243355419609602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78241171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39120575 + 39120576.

It is an arithmetic number, because the mean of its divisors is an integer number (39120576).

Almost surely, 2^78241151 is an apocalyptic number.

78241151 is a deficient number, since it is larger than the sum of its proper divisors (1).

78241151 is an equidigital number, since it uses as much as digits as its factorization.

78241151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 29.

The square root of 78241151 is about 8845.4028172831. The cubic root of 78241151 is about 427.7057382084.

The spelling of 78241151 in words is "seventy-eight million, two hundred forty-one thousand, one hundred fifty-one".