51620354 has 4 divisors (see below), whose sum is σ = 77430534. Its totient is φ = 25810176.

The previous prime is 51620341. The next prime is 51620369. The reversal of 51620354 is 45302615.

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

It can be written as a sum of positive squares in only one way, i.e., 43864129 + 7756225 = 6623^2 + 2785^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12905087 + ... + 12905090.

Almost surely, 2^51620354 is an apocalyptic number.

51620354 is a deficient number, since it is larger than the sum of its proper divisors (25810180).

51620354 is a wasteful number, since it uses less digits than its factorization.

51620354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25810179.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 51620354 is about 7184.7306142958. The cubic root of 51620354 is about 372.3405416319.

Adding to 51620354 its reverse (45302615), we get a palindrome (96922969).

The spelling of 51620354 in words is "fifty-one million, six hundred twenty thousand, three hundred fifty-four".