651423442 has 8 divisors (see below), whose sum is σ = 1034613756. Its totient is φ = 306552192.

The previous prime is 651423439. The next prime is 651423467. The reversal of 651423442 is 244324156.

It can be written as a sum of positive squares in 2 ways, for example, as 514790721 + 136632721 = 22689^2 + 11689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9579723 + ... + 9579790.

Almost surely, 2^651423442 is an apocalyptic number.

651423442 is a deficient number, since it is larger than the sum of its proper divisors (383190314).

651423442 is a wasteful number, since it uses less digits than its factorization.

651423442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19159532.

The product of its digits is 23040, while the sum is 31.

The square root of 651423442 is about 25522.9982956548. The cubic root of 651423442 is about 866.8709731023.

Adding to 651423442 its reverse (244324156), we get a palindrome (895747598).

The spelling of 651423442 in words is "six hundred fifty-one million, four hundred twenty-three thousand, four hundred forty-two".