401157157 has 4 divisors (see below), whose sum is σ = 401245516. Its totient is φ = 401068800.

The previous prime is 401157151. The next prime is 401157199. The reversal of 401157157 is 751751104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 347486881 + 53670276 = 18641^2 + 7326^2 .

It is a cyclic number.

It is not a de Polignac number, because 401157157 - 2¹¹ = 401155109 is a prime.

It is a super-2 number, since 2×401157157² = 321854129224645298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401157151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36978 + ... + 46579.

It is an arithmetic number, because the mean of its divisors is an integer number (100311379).

Almost surely, 2^401157157 is an apocalyptic number.

It is an amenable number.

401157157 is a deficient number, since it is larger than the sum of its proper divisors (88359).

401157157 is an equidigital number, since it uses as much as digits as its factorization.

401157157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88358.

The product of its (nonzero) digits is 4900, while the sum is 31.

The square root of 401157157 is about 20028.9080331405. The cubic root of 401157157 is about 737.5161161661.

The spelling of 401157157 in words is "four hundred one million, one hundred fifty-seven thousand, one hundred fifty-seven".