400251053 has 4 divisors (see below), whose sum is σ = 400291740. Its totient is φ = 400210368.

The previous prime is 400251031. The next prime is 400251079. The reversal of 400251053 is 350152004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 399480169 + 770884 = 19987^2 + 878^2 .

It is a cyclic number.

It is not a de Polignac number, because 400251053 - 2⁶ = 400250989 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 (400251023) 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, 4643 + ... + 28671.

It is an arithmetic number, because the mean of its divisors is an integer number (100072935).

Almost surely, 2^400251053 is an apocalyptic number.

It is an amenable number.

400251053 is a deficient number, since it is larger than the sum of its proper divisors (40687).

400251053 is a wasteful number, since it uses less digits than its factorization.

400251053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40686.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 400251053 is about 20006.2753405025. The cubic root of 400251053 is about 736.9604153499.

It can be divided in two parts, 4002 and 51053, that added together give a palindrome (55055).

The spelling of 400251053 in words is "four hundred million, two hundred fifty-one thousand, fifty-three".