621324542 has 4 divisors (see below), whose sum is σ = 931986816. Its totient is φ = 310662270.

The previous prime is 621324533. The next prime is 621324547. The reversal of 621324542 is 245423126.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621324547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155331134 + ... + 155331137.

It is an arithmetic number, because the mean of its divisors is an integer number (232996704).

Almost surely, 2^621324542 is an apocalyptic number.

621324542 is a deficient number, since it is larger than the sum of its proper divisors (310662274).

621324542 is a wasteful number, since it uses less digits than its factorization.

621324542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310662273.

The product of its digits is 11520, while the sum is 29.

The square root of 621324542 is about 24926.3824491241. The cubic root of 621324542 is about 853.3086919493.

Adding to 621324542 its reverse (245423126), we get a palindrome (866747668).

The spelling of 621324542 in words is "six hundred twenty-one million, three hundred twenty-four thousand, five hundred forty-two".