401322157 has 2 divisors, whose sum is σ = 401322158. Its totient is φ = 401322156.

The previous prime is 401322127. The next prime is 401322169. The reversal of 401322157 is 751223104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 389904516 + 11417641 = 19746^2 + 3379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401322157 is a prime.

It is a super-2 number, since 2×401322157² = 322118947398265298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401322107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200661078 + 200661079.

It is an arithmetic number, because the mean of its divisors is an integer number (200661079).

Almost surely, 2^401322157 is an apocalyptic number.

It is an amenable number.

401322157 is a deficient number, since it is larger than the sum of its proper divisors (1).

401322157 is an equidigital number, since it uses as much as digits as its factorization.

401322157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 401322157 is about 20033.0266559998. The cubic root of 401322157 is about 737.6172182543.

The spelling of 401322157 in words is "four hundred one million, three hundred twenty-two thousand, one hundred fifty-seven".