51523402 has 64 divisors (see below), whose sum is σ = 97920000. Its totient is φ = 20257776.

The previous prime is 51523399. The next prime is 51523403. The reversal of 51523402 is 20432515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51523403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 768973 + ... + 769039.

It is an arithmetic number, because the mean of its divisors is an integer number (1530000).

Almost surely, 2^51523402 is an apocalyptic number.

51523402 is a deficient number, since it is larger than the sum of its proper divisors (46396598).

51523402 is a wasteful number, since it uses less digits than its factorization.

51523402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51523402 is about 7177.9803566184. The cubic root of 51523402 is about 372.1072887825.

Adding to 51523402 its reverse (20432515), we get a palindrome (71955917).

The spelling of 51523402 in words is "fifty-one million, five hundred twenty-three thousand, four hundred two".