401312251 has 8 divisors (see below), whose sum is σ = 425581344. Its totient is φ = 377116800.

The previous prime is 401312231. The next prime is 401312293. The reversal of 401312251 is 152213104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401312251 is a prime.

It is a super-2 number, since 2×401312251² = 322103045605374002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401312231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6975 + ... + 29176.

It is an arithmetic number, because the mean of its divisors is an integer number (53197668).

Almost surely, 2^401312251 is an apocalyptic number.

401312251 is a deficient number, since it is larger than the sum of its proper divisors (24269093).

401312251 is a wasteful number, since it uses less digits than its factorization.

401312251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36821.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 401312251 is about 20032.7794127525. The cubic root of 401312251 is about 737.6111492346.

Adding to 401312251 its reverse (152213104), we get a palindrome (553525355).

The spelling of 401312251 in words is "four hundred one million, three hundred twelve thousand, two hundred fifty-one".