405213051 has 16 divisors (see below), whose sum is σ = 545040128. Its totient is φ = 267775200.

The previous prime is 405213047. The next prime is 405213089. The reversal of 405213051 is 150312504.

It is not a de Polignac number, because 405213051 - 2² = 405213047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405213001) 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, 174186 + ... + 176496.

It is an arithmetic number, because the mean of its divisors is an integer number (34065008).

Almost surely, 2^405213051 is an apocalyptic number.

405213051 is a deficient number, since it is larger than the sum of its proper divisors (139827077).

405213051 is a wasteful number, since it uses less digits than its factorization.

405213051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 405213051 is about 20129.9043961962. The cubic root of 405213051 is about 739.9933350995.

Adding to 405213051 its reverse (150312504), we get a palindrome (555525555).

The spelling of 405213051 in words is "four hundred five million, two hundred thirteen thousand, fifty-one".