152621591 has 2 divisors, whose sum is σ = 152621592. Its totient is φ = 152621590.

The previous prime is 152621569. The next prime is 152621593. The reversal of 152621591 is 195126251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 152621591 - 2⁶ = 152621527 is a prime.

Together with 152621593, 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 (152621593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76310795 + 76310796.

It is an arithmetic number, because the mean of its divisors is an integer number (76310796).

Almost surely, 2^152621591 is an apocalyptic number.

152621591 is a deficient number, since it is larger than the sum of its proper divisors (1).

152621591 is an equidigital number, since it uses as much as digits as its factorization.

152621591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 32.

The square root of 152621591 is about 12354.0111299934. The cubic root of 152621591 is about 534.4068203570.

The spelling of 152621591 in words is "one hundred fifty-two million, six hundred twenty-one thousand, five hundred ninety-one".