152651921 has 2 divisors, whose sum is σ = 152651922. Its totient is φ = 152651920.

The previous prime is 152651903. The next prime is 152651923. The reversal of 152651921 is 129156251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133633600 + 19018321 = 11560^2 + 4361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152651921 is a prime.

Together with 152651923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (152651923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76325960 + 76325961.

It is an arithmetic number, because the mean of its divisors is an integer number (76325961).

Almost surely, 2^152651921 is an apocalyptic number.

It is an amenable number.

152651921 is a deficient number, since it is larger than the sum of its proper divisors (1).

152651921 is an equidigital number, since it uses as much as digits as its factorization.

152651921 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 152651921 is about 12355.2386055470. The cubic root of 152651921 is about 534.4422183309.

The spelling of 152651921 in words is "one hundred fifty-two million, six hundred fifty-one thousand, nine hundred twenty-one".