53021402 has 16 divisors (see below), whose sum is σ = 96240960. Its totient is φ = 21386688.

The previous prime is 53021393. The next prime is 53021431. The reversal of 53021402 is 20412035.

It is a super-2 number, since 2×53021402² = 5622538140091208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 111152 + ... + 111627.

It is an arithmetic number, because the mean of its divisors is an integer number (6015060).

Almost surely, 2^53021402 is an apocalyptic number.

53021402 is a deficient number, since it is larger than the sum of its proper divisors (43219558).

53021402 is a wasteful number, since it uses less digits than its factorization.

53021402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222805.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 53021402 is about 7281.5796363152. The cubic root of 53021402 is about 375.6791296416.

Adding to 53021402 its reverse (20412035), we get a palindrome (73433437).

The spelling of 53021402 in words is "fifty-three million, twenty-one thousand, four hundred two".