155362391 has 2 divisors, whose sum is σ = 155362392. Its totient is φ = 155362390.

The previous prime is 155362379. The next prime is 155362393. The reversal of 155362391 is 193263551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155362391 is a prime.

Together with 155362393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155362393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77681195 + 77681196.

It is an arithmetic number, because the mean of its divisors is an integer number (77681196).

Almost surely, 2^155362391 is an apocalyptic number.

155362391 is a deficient number, since it is larger than the sum of its proper divisors (1).

155362391 is an equidigital number, since it uses as much as digits as its factorization.

155362391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24300, while the sum is 35.

The square root of 155362391 is about 12464.4450738892. The cubic root of 155362391 is about 537.5868441614.

The spelling of 155362391 in words is "one hundred fifty-five million, three hundred sixty-two thousand, three hundred ninety-one".