401564554 has 4 divisors (see below), whose sum is σ = 602346834. Its totient is φ = 200782276.

The previous prime is 401564551. The next prime is 401564557. The reversal of 401564554 is 455465104.

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

It is an interprime number because it is at equal distance from previous prime (401564551) and next prime (401564557).

It can be written as a sum of positive squares in only one way, i.e., 274664329 + 126900225 = 16573^2 + 11265^2 .

It is a super-2 number, since 2×401564554² = 322508182058437832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401564551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100391137 + ... + 100391140.

Almost surely, 2^401564554 is an apocalyptic number.

401564554 is a deficient number, since it is larger than the sum of its proper divisors (200782280).

401564554 is a wasteful number, since it uses less digits than its factorization.

401564554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200782279.

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 401564554 is about 20039.0756772861. The cubic root of 401564554 is about 737.7656943289.

The spelling of 401564554 in words is "four hundred one million, five hundred sixty-four thousand, five hundred fifty-four".