402045422531 has 4 divisors (see below), whose sum is σ = 402049046952. Its totient is φ = 402041798112.

The previous prime is 402045422507. The next prime is 402045422533. The reversal of 402045422531 is 135224540204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402045422531 is a prime.

It is a super-2 number, since 2×402045422531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402045422533) 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, 1640390 + ... + 1869483.

It is an arithmetic number, because the mean of its divisors is an integer number (100512261738).

Almost surely, 2^402045422531 is an apocalyptic number.

402045422531 is a deficient number, since it is larger than the sum of its proper divisors (3624421).

402045422531 is a wasteful number, since it uses less digits than its factorization.

402045422531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624420.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 402045422531 its reverse (135224540204), we get a palindrome (537269962735).

The spelling of 402045422531 in words is "four hundred two billion, forty-five million, four hundred twenty-two thousand, five hundred thirty-one".