355402431 has 16 divisors (see below), whose sum is σ = 532869120. Its totient is φ = 234078840.

The previous prime is 355402393. The next prime is 355402451. The reversal of 355402431 is 134204553.

It is not a de Polignac number, because 355402431 - 2¹³ = 355394239 is a prime.

It is a super-2 number, since 2×355402431² = 252621775921419522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 355402395 and 355402404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355402451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77055 + ... + 81536.

It is an arithmetic number, because the mean of its divisors is an integer number (33304320).

Almost surely, 2^355402431 is an apocalyptic number.

355402431 is a deficient number, since it is larger than the sum of its proper divisors (177466689).

355402431 is a wasteful number, since it uses less digits than its factorization.

355402431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158683 (or 158677 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 355402431 is about 18852.1200664541. The cubic root of 355402431 is about 708.3373320682.

Adding to 355402431 its reverse (134204553), we get a palindrome (489606984).

The spelling of 355402431 in words is "three hundred fifty-five million, four hundred two thousand, four hundred thirty-one".