25213533442 has 32 divisors (see below), whose sum is σ = 40262261760. Its totient is φ = 11801011200.

The previous prime is 25213533431. The next prime is 25213533509. The reversal of 25213533442 is 24433531252.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 25213533398 and 25213533407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5001159 + ... + 5006197.

It is an arithmetic number, because the mean of its divisors is an integer number (1258195680).

Almost surely, 2^25213533442 is an apocalyptic number.

25213533442 is a deficient number, since it is larger than the sum of its proper divisors (15048728318).

25213533442 is a wasteful number, since it uses less digits than its factorization.

25213533442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5826.

The product of its digits is 86400, while the sum is 34.

The spelling of 25213533442 in words is "twenty-five billion, two hundred thirteen million, five hundred thirty-three thousand, four hundred forty-two".