400402151 has 4 divisors (see below), whose sum is σ = 400923600. Its totient is φ = 399880704.

The previous prime is 400402127. The next prime is 400402183. The reversal of 400402151 is 151204004.

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

It is a cyclic number.

It is not a de Polignac number, because 400402151 - 2¹⁴ = 400385767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400407151) 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, 259571 + ... + 261108.

It is an arithmetic number, because the mean of its divisors is an integer number (100230900).

Almost surely, 2^400402151 is an apocalyptic number.

400402151 is a deficient number, since it is larger than the sum of its proper divisors (521449).

400402151 is an equidigital number, since it uses as much as digits as its factorization.

400402151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521448.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 400402151 is about 20010.0512493097. The cubic root of 400402151 is about 737.0531398492.

Adding to 400402151 its reverse (151204004), we get a palindrome (551606155).

The spelling of 400402151 in words is "four hundred million, four hundred two thousand, one hundred fifty-one".