402540055 has 8 divisors (see below), whose sum is σ = 483834672. Its totient is φ = 321507648.

The previous prime is 402540041. The next prime is 402540107. The reversal of 402540055 is 550045204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402540055 is a prime.

It is a super-4 number, since 4×402540055⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62157 + ... + 68326.

It is an arithmetic number, because the mean of its divisors is an integer number (60479334).

Almost surely, 2^402540055 is an apocalyptic number.

402540055 is a deficient number, since it is larger than the sum of its proper divisors (81294617).

402540055 is a wasteful number, since it uses less digits than its factorization.

402540055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131105.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 402540055 is about 20063.4008832002. The cubic root of 402540055 is about 738.3626171902.

Adding to 402540055 its reverse (550045204), we get a palindrome (952585259).

The spelling of 402540055 in words is "four hundred two million, five hundred forty thousand, fifty-five".