402150557 has 4 divisors (see below), whose sum is σ = 402393180. Its totient is φ = 401907936.

The previous prime is 402150533. The next prime is 402150563. The reversal of 402150557 is 755051204.

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 315027001 + 87123556 = 17749^2 + 9334^2 .

It is a cyclic number.

It is not a de Polignac number, because 402150557 - 2⁶ = 402150493 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 (402150517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118808 + ... + 122145.

It is an arithmetic number, because the mean of its divisors is an integer number (100598295).

Almost surely, 2^402150557 is an apocalyptic number.

It is an amenable number.

402150557 is a deficient number, since it is larger than the sum of its proper divisors (242623).

402150557 is a wasteful number, since it uses less digits than its factorization.

402150557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242622.

The product of its (nonzero) digits is 7000, while the sum is 29.

The square root of 402150557 is about 20053.6918546187. The cubic root of 402150557 is about 738.1243936340.

The spelling of 402150557 in words is "four hundred two million, one hundred fifty thousand, five hundred fifty-seven".